Nikkei falls as investors lock in profits as weak yen trend pauses

* Lack of macro factors may keep market directionless - analyst * Kajima jumps on Nomura's rating hike By Ayai Tomisawa TOKYO, Aug 26 (Reuters) - Japan's Nikkei share average edged down on Tuesday morning in choppy trade as investors took profits from the recent gains in exporters as the weak yen trend paused, but losses were limited with the market supported by resilient U.S. shares. The Nikkei shed 0.3 percent to 15,561.25 in mid-morning trade after flirting with positive ter