As of 9:15 a.m., the 225-issue Nikkei Stock Average added 423.20 points, or 1.41 percent, from Wednesday to 30,337.53.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, rose 17.67 points, or 0.89 percent, at 2,001.70.
Electric appliance, construction and marine transportation issues comprised those that gained the most in the opening minutes after the morning bell.
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