As of 9:15 a.m., the 225-issue Nikkei Stock Average gained 112.48 points, or 0.39 percent, from Thursday to 29,324.12.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, added 1.58 points, or 0.08 percent, at 1,926.50.
Electric appliance, oil and coal product and metal product issues comprised those that gained the most in the opening minutes after the morning bell.
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