CORRECTED-Nikkei set to rise as Fed stimulus concerns ease, market still on edge

(Corrects 7th paragraph to quote Hirano saying that it was not a "bear market", instead of "bull market".) TOKYO, May 31 (Reuters) - Japan's Nikkei share average is set to recoup some of its recent steep losses on Friday, as soft U.S. economic data eased concerns that the Federal Reserve would soon start unwinding its massive stimulus. However, investors in Japanese equities remain on edge amid the recent volatile price action and sharp declines, including Thursday's 5.2 percent slide t