Japan's benchmark Nikkei stock index, the 225-issue Nikkei Stock Average, ended up 251.82 points, or 0.61 percent, from Tuesday at 41,831.99.
The broader Topix index, meanwhile, finished 13.65 points, or 0.47 percent, higher at 2,909.20.
Market watchers here noted there is room for further advances for Japanese stocks, as companies are projected to report stronger-than-expected earnings for the April-June quarter, with announcements set to start later this month.
As many companies are likely to see strong performances in the quarter, there are expectations that such companies will revise upward their full-year earnings when they announce midterm results, brokers said.
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