TOKYO (AFP) - Tokyo stocks plunged more than three per cent on Friday afternoon, a day after suffering the worst one-day drop since Japan's March 2011 quake-tsunami disaster.

The Nikkei index, which on Thursday tumbled 7.3 per cent, was down 3.37 per cent, or 488.64 points, at 13,995.34 at 0445 GMT (12.45 pm Singapore time).