Tokyo stocks extended gains Tuesday morning as a solid lead from Wall Street overnight set a positive tone while a comparatively weak yen against the U.S. dollar lifted exporter issues and buoyed the broader market.

The 225-issue Nikkei Stock Average added 288.06 points, or 1.45 percent, from Friday to 20,197.56, while the broader Topix index of all First Section issues on the Tokyo Stock Exchange gained 21.76 points, or 1.33 percent, to 1,660.70.

The benchmark Nikkei stock index breached the psychologically important 20,000 line for the first time in six weeks.

The broader Topix index, meanwhile, rose to a two-year high during morning trade on Tuesday.

The majority of industry categories on the main section advanced into positive territory, with insurance, securities and marine transportation-linked issues comprising those that gained the most by the morning break.

Markets here were closed on Monday for a national holiday.