Japan's key stock index advanced Friday as traders bought nonferrous metal, steel and oil stocks after overseas commodity prices rose. The U.S. dollar fell against the Japanese yen and euro. The Nikkei Stock Average of 225 issues rose 97.65 points, or 0.86 percent, to 11,514.03 points on the Tokyo Stock Exchange. The index edged up half a point, negligible in percentage terms, Thursday. The Nikkei rose six straight sessions, adding a total of 353.15 points, or 3.16 percent. The U.S. dollar was trading at 108.86 yen on the Tokyo foreign exchange market at 5 p.m. (0800GMT) Friday, down 0.48 yen from late Thursday and also below the 108.94 yen it bought in New York later that day. On the stock market, "raw materials stocks also benefited" as investors bought them after their recent declines, UFJ Tsubasa Securities chief strategist Seiki Orimi said. The bank-heavy TOPIX index, which includes all issues on the Tokyo Stock Exchange's first section, rose 11.79 points, or 1.02 percent, to 1,172.33 points. On Thursday, it rose 2.31 points, or 0.20 percent. Volume on the first section totaled 1.660 billion shares, up from 1.568 billion