Share prices on the Tokyo Stock Exchange tumbled to a new postbubble low Monday, with the benchmark 225-issue Nikkei stock average losing 456.53 points to end the day at 12,171.37.

That's the lowest close since July 31, 1985.

The broader Tokyo Stock Price Index of all first-section issues also plummeted, losing 31.78 points, or 2.6 percent, to finish at 1,205.98.

Tokyo stocks lost ground across the board, but high-tech issues came under especially heavy selling pressure in the wake of Friday's huge plunge of the U.S. Nasdaq composite index.

The technology-oriented Nasdaq plummeted 115.95 points to 2,052.78 Friday, closing below 2,100 for the first time since December 1998.

The market shrugged off news earlier in the day that gross domestic product grew a real 0.8 percent in the October-December quarter, marking a turnaround from a 0.6 percent contraction posted in the previous quarter. Investors also ignored a package of emergency stimulus measures unveiled Friday by the ruling coalition.