================================================================================

                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549


                                 SCHEDULE 13G
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934

                              (AMENDMENT NO. 2)*


                               NIDEC CORPORATION
                               (Name of Issuer)


                                 COMMON STOCK
                        (Title of Class of Securities)


                                   654090109
                                (CUSIP Number)


                               DECEMBER 31, 2006
            (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

         [X]  Rule 13d-1(b)

         [_]  Rule 13d-1(c)

         [_]  Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which
would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).

================================================================================


-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       Mitsubishi UFJ Financial Group, Inc.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Tokyo, Japan
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          6,138,828
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        6,138,828
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       6,138,828
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       4.2%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 2 of 23



-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       The Bank of Tokyo-Mitsubishi UFJ, Ltd.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Tokyo, Japan
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          3,014,144
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        3,014,144
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       3,014,144
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       2.1%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 3 of 23



-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       Mitsubishi UFJ Trust and Banking Corporation
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Tokyo, Japan
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          2,310,800
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        2,310,800
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       2,310,800
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       1.6%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 4 of 23


-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       Mitsubishi UFJ Securities Co., Ltd.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Tokyo, Japan
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          88,884
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        88,884
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       88,884
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       0.1%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 5 of 23



-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       Mitsubishi UFJ Asset Management Co., Ltd.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Tokyo, Japan
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          226,000
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        226,000
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       226,000
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       0.2%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 6 of 23


-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       Mitsubishi UFJ Asset Management (UK) Ltd.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       London, United Kingdom
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          400
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        400
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       400
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       0.0%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 7 of 23


-----------------------
CUSIP NO. 654090109
-----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

       MU Investments Co., Ltd.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
       (See Instructions)                                           (a)   [_]
                                                                    (b)   [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Tokyo, Japan
--------------------------------------------------------------------------------
       NUMBER OF                  5     SOLE VOTING POWER

        SHARES                          499,000
                                ------------------------------------------------
     BENEFICIALLY                 6     SHARED VOTING POWER

       OWNED BY                         -0-
                                ------------------------------------------------
         EACH                     7     SOLE DISPOSITIVE POWER

       REPORTING                        499,000
                                ------------------------------------------------
        PERSON                    8     SHARED DISPOSITIVE POWER

         WITH                           -0-
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       499,000
--------------------------------------------------------------------------------
  10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
       (See Instructions)
                                                                          [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       0.3%
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON (See Instructions)

       CO
--------------------------------------------------------------------------------

                                  Page 8 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


ITEM 1

         (a)      NAME OF ISSUER

                  Nidec Corporation

         (b)      ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES

                  338 Kuzetonoshiro-cho,  Minami-ku, Kyoto 601-8205, Japan


ITEM 2

         (a)      NAMES OF PERSONS FILING

                  Mitsubishi UFJ Financial Group, Inc. ("MUFG")

                  The Bank of Tokyo-Mitsubishi UFJ, Ltd. ("BTMU")

                  Mitsubishi UFJ Trust and Banking Corporation ("MUTB")

                  Mitsubishi UFJ Securities Co., Ltd. ("MUS")

                  Mitsubishi UFJ Asset Management Co., Ltd. ("MUAM")

                  Mitsubishi UFJ Asset Management (UK) Ltd. ("MUAMUK")

                  MU Investments Co., Ltd. ("MUI")

         (b)      ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE

                  MUFG:
                  7-1 Marunouchi 2-chome, Chiyoda-ku
                  Tokyo 100-8330, Japan

                  BTMU:
                  7-1 Marunouchi 2-chome, Chiyoda-ku
                  Tokyo 100-8388, Japan

                  MUTB:
                  4-5 Marunouchi 1-chome, Chiyoda-ku
                  Tokyo 100-8212, Japan

                  MUS:
                  4-1 Marunouchi 2-chome, Chiyoda-ku
                  Tokyo, 100-6317, Japan

                  MUAM:
                  4-5 Marunouchi 1-chome, Chiyoda-ku
                  Tokyo 100-8212, Japan

                  MUAMUK
                  12-15 Finsbury Circus, London, EC2M 7BT
                  United Kingdom


                                  Page 9 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


                  MUI:
                  2-15 Nihonbashi Muromachi 3-chome, Chuo-ku
                  Tokyo 103-0022, Japan

         (c)      CITIZENSHIP

                  Not applicable.

         (d)      TITLE OF CLASS OF SECURITIES

                  Common Stock

         (e)      CUSIP NUMBER

                  654090109


ITEM 3            IF THIS STATEMENT IS FILED PURSUANT TO SECTION 240.13d-1(b)
                  OR 240.13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS
                  A:

         MUFG:      (a)  [ ] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [ ] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [ ] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);

                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [X] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);

                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);

                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).

         BTMU:      (a)  [ ] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [X] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [ ] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);


                                  Page 10 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [ ] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);

                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);

                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).

         MUTB:      (a)  [ ] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [X] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [ ] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);

                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [ ] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);

                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);

                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).

         MUS:       (a)  [X] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [ ] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [ ] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);

                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [ ] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);


                                  Page 11 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);

                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).

         MUAM:      (a)  [ ] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [ ] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [X] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);

                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [ ] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);

                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);

                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).

     MUAMUK:        (a)  [ ] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [ ] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [X] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);

                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [ ] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);

                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);


                                  Page 12 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).

         MUI:       (a)  [ ] Broker or dealer registered under section 15 of
                             the Act (15 U.S.C. 78o).

                    (b)  [ ] Bank as defined in section 3(a)(6) of the Act (15
                             U.S.C. 78c).

                    (c)  [ ] Insurance company as fined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c).

                    (d)  [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940 (15 U.S.C.
                             80a-8).

                    (e)  [X] An investment adviser in accordance with section
                             240.13d-1(b)(1)(ii)(E);

                    (f)  [ ] An employee benefit plan or endowment fund in
                             accordance with section 240.13d-1(b)(1)(ii)(F);

                    (g)  [ ] A parent holding company or control person in
                             accordance with section 240.13d-1(b)(1)(ii)(G);

                    (h)  [ ] A savings association as defined in section 3(b)
                             of the Federal Deposit Insurance Act (12 U.S.C.
                             1813);

                    (i)  [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940
                             (15 U.S.C. 80a-3);

                    (j)  [ ] Group, in accordance with section
                             240.13d-1(b)(1)(ii)(J).


ITEM 4            OWNERSHIP

                  Provide the following information regarding the aggregate
                  number and percentage of the class of securities of the
                  issuer identified in Item 1.

                  For MUFG

                  (a) Amount Beneficially Owned:                       6,138,828

                  (b) Percent of Class:                                    4.24%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:  6,138,828

                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                            6,138,828

                      (iv)  Shared power to dispose or to direct the
                            disposition of:                                  -0-


                  For BTMU

                  (a) Amount Beneficially Owned:                       3,014,144

                  (b) Percent of Class:                                    2.08%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:  3,014,144


                                  Page 13 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                            3,014,144

                      (iv)  Shared power to dispose or to direct the
                            disposition of:                                 -0-


                  For MUTB

                  (a) Amount Beneficially Owned:                       2,310,800

                  (b) Percent of Class:                                    1.60%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:  2,310,800

                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                            2,310,800

                      (iv) Shared power to dispose or to direct the
                           disposition of:                                   -0-


                  For MUS

                  (a) Amount Beneficially Owned:                          88,884

                  (b) Percent of Class:                                    0.06%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:     88,884

                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                               88,884

                      (iv)  Shared power to dispose or to direct the
                            disposition of:                                  -0-


                  For MUAM

                  (a) Amount Beneficially Owned:                         226,000

                  (b) Percent of Class:                                    0.16%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:    226,000

                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                              226,000

                      (iv)  Shared power to dispose or to direct the
                            disposition of:                                  -0-


                  For MUAMUK

                  (a) Amount Beneficially Owned:                             400

                  (b) Percent of Class:                                    0.00%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:        400


                                  Page 14 of 23


-----------------------
CUSIP NO. 654090109
-----------------------


                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                                  400

                      (iv)  Shared power to dispose or to direct the
                            disposition of:                                  -0-


                  For MUI

                  (a) Amount Beneficially Owned:                         499,000

                  (b) Percent of Class:                                    0.34%

                  (c) Number of shares as to which the person has:

                      (i)   Sole power to vote or to direct the vote:    499,000

                      (ii)  Shared power to vote or to direct the vote:      -0-

                      (iii) Sole power to dispose or to direct the
                            disposition of:                              499,000

                      (iv) Shared power to dispose or to direct the
                           disposition of:                                   -0-


ITEM 5            OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

                  If this statement is being filed to report the fact that as
                  of December 31, 2006, the reporting person has ceased to be
                  the beneficial owner of more than five percent of the class
                  of securities, check the following: [X]


ITEM 6            OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
                  PERSON

                  Not applicable.


ITEM 7            IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
                  ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT
                  HOLDING COMPANY

                  As of December 31, 2006, MUFG beneficially owns 6,138,828
                  shares indirectly through its subsidiaries as follows: BTMU
                  holds 3,014,144 shares; MUTB holds 2,310,800 shares; MUS
                  holds 88,884 shares; MUAM holds 226,000 shares (including
                  400 shares indirectly held through MUAM's subsidiary,
                  MUAMUK); and MUI holds 499,000 shares.

ITEM 8            IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

                  Not applicable.


ITEM 9            NOTICE OF DISSOLUTION OF GROUP

                  Not applicable.


ITEM 10           CERTIFICATION

                  By signing below the filers certify that, to the extent of
                  their best knowledge and belief, the securities referred to
                  above were acquired and are held in the ordinary course of
                  business and were


                                  Page 15 of 23


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CUSIP NO. 654090109
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                  not acquired and are not held for the purpose of or with the
                  effect of changing or influencing the control of the issuer
                  of the securities and were not acquired and are not held in
                  connection with or as a participant in any transaction
                  having that purpose or effect.



                                  Page 16 of 23


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CUSIP NO. 654090109
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                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    MITSUBISHI UFJ FINANCIAL GROUP, INC.



                                    By:   /s/ Takami Onodera
                                          ------------------------------
                                    Name:  Takami Onodera

                                    Title: General Manager, Credit &
                                           Investment Management Division





                                  Page 17 of 23


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CUSIP NO. 654090109
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                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    THE BANK OF TOKYO-MITSUBISHI UFJ, LTD.



                                    By:   /s/ Takami Onodera
                                          --------------------------------
                                    Name:  Takami Onodera

                                    Title:  General Manager, Credit Policy
                                            & Planning Division





                                  Page 18 of 23


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CUSIP NO. 654090109
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                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    MITSUBISHI UFJ TRUST AND BANKING CORPORATION



                                    By:   /s/ Koji Kawakami
                                          -------------------------------------
                                    Name:  Koji Kawakami

                                    Title:  Deputy General Manager of Trust
                                            Assets Planning Division





                                  Page 19 of 23


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CUSIP NO. 654090109
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                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    MITSUBISHI UFJ SECURITIES CO., LTD.



                                    By:   /s/ Akio Sashida
                                          -----------------------------
                                    Name:  Akio Sashida

                                    Title:  Executive Officer & General
                                            Manager





                                  Page 20 of 23


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CUSIP NO. 654090109
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                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    MITSUBISHI UFJ ASSET MANAGEMENT CO., LTD.



                                    By:   /s/ Yasushi Inoue
                                          -----------------------------------
                                    Name:  Yasushi Inoue

                                    Title:  General Manager of Risk Management
                                            Division





                                  Page 21 of 23


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CUSIP NO. 654090109
-----------------------


                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    MITSUBISHI UFJ ASSET MANAGEMENT (UK) LTD.



                                    By:   /s/ Hiroyuki  Mori
                                          -----------------------------------
                                    Name:  Hiroyuki Mori

                                    Title:  Managing Director & CE





                                  Page 22 of 23


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CUSIP NO. 654090109
-----------------------


                                   SIGNATURE


After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



                                    Date: January 31, 2007



                                    MU INVESTMENTS CO., LTD.



                                    By:   /s/ Kenji Fujii
                                          ---------------------------
                                    Name:  Kenji Fujii

                                    Title:  General Manager of Risk
                                            Management Dept.





                                 Page 23 of 23