As of 9:15 a.m., the 225-issue Nikkei Stock Average added 29.26 points, or 0.13 percent, from Wednesday to 23,421.12.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, gained 1.73 points, or 0.10 percent, at 1,716.68.
Metal product, electric appliance and machinery-linked issues comprised those that gained the most in the opening minutes after the morning bell.
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