As of 9:15 a.m., the 225-issue Nikkei Stock Average added 62.90 points, or 0.27 percent, from Wednesday to 23,485.72.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, gained 1.10 points, or 0.07 percent, at 1,647.57.
Marine transportation, iron and steel, and pulp and paper issues comprised those that advanced the most in the opening minutes after the morning bell.
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