TOKYO, June 6 (Xinhua) -- Tokyo stocks gained marginally Wednesday morning as investors fully digested solid U.S. non-manufacturing activity data released overnight with this becoming a motivating buying cue amid concerns about U.S. protectionist trade policies.

The 225-issue Nikkei Stock Average added 51.57 points, or 0.23 percent, from Tuesday to 22,591.11.

The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, gained 2.59 points, or 0.15 percent, to 1,777.55.

Pulp and paper, nonferrous metal, and oil and coal product-linked issues comprised those that gained the most by the morning break.