The 225-issue Nikkei Stock Average dropped 60.75 points, or 0.31 percent, from Thursday to 19,854.03.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, fell 4.59 points, or 0.32 percent, at 1,441.96.
Real estate, farm and fishery, and food-oriented issues comprised those that declined the most by the morning break.
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