Nikkei up for 8th day, but low volumes may portend imminent correction

TOKYO, May 26 (Reuters) - Japanese stocks edged up in a choppy session on Tuesday, with the eighth day of gains underpinned by optimism about the economy's recovery. The Nikkei 225 ended 0.1 percent higher at 20,437.48 after flitting between positive and negative territory during the session. Although the subdued activity raised the risk of profit-taking, the Nikkei's eight-day gains marked its longest winning streak since last August. The broader Topix was flat at 1,659.57, with o