LOS ANGELES Japanese stocks opened weaker Friday as the Bank of Japan’s tankan survey of business sentiment showed a worse-than-expected result for large manufacturers, although the yen’s drop to its lowest level against the dollar since late March helped limit losses. The Nikkei Stock Average traded 0.3% lower at 9,709.96, though off its opening lows, while the broader Topix edged down 0.1%. The downbeat result from the tankan appeared to weigh on some manufacturing names, with Olympus Corp. down 1.6%, TDK Corp. falling 1.2%, Honda Motor Co. lower by 0.7%, and Mitsubishi Motors Corp. losing 1.2%. Among the gainers, Sharp Corp. added 1.2% to its previous session gains on reports Apple Inc. was working with the firm to test television designs. Fujitsu Ltd. also extended its rally with a 4.2% jump, while Renesas Electronics Corp. added 1%.