TOKYO, July 20 (Xinhua) -- Tokyo stocks lost ground Friday morning as selling increased due to the yen's rise and other countries' currencies retreating significantly against the U.S. dollar, which dragged down exporters here amid concern about the global economic outlook.

The 225-issue Nikkei Stock Average dropped 112.26 points, or 0.49 percent, from Thursday to 22,652.42.

The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, fell 4.74 points, or 0.27 percent, at 1,744.85.

Nonferrous metal, iron and steel and machinery-linked issues comprised those that declined the most by the morning break.