Nikkei rises to fresh 15-year high as Fed supports mood

By Ayai Tomisawa TOKYO, Feb 26 (Reuters) - Japan's Nikkei share average rose to a new 15-year high on Thursday after hedge funds were seen buying futures, while index-heavyweight stocks rose as investor risk appetite improved following benign comments by Fed Chair Janet Yellen. The Nikkei ended 1.1 percent higher at 18,785.79, the highest closing level since April 2000. The broader Topix gained 0.9 percent to 1,521.68 and the JPX-Nikkei Index 400 added 0.9 percent to 13,791.15. M