Japan's major stock index rebounded about 6 per cent on Wednesday's opening bell after the benchmark Nikkei 225 Stock Average lost more than 10 per cent in the previous trading session, dpa reported.
The benchmark Nikkei 225 Stock Average gained 520.7 points, or 6.05 per cent, to trade at 9,125.85 at 9:15 am (0015 GMT), while the broader Topix index was up 46.45 points, or 6.06 per cent, at 813.18.
The Nikkei dove 10.55 per cent and the Topix plunged 9.47 per cent as concerns mounted over the economic impact of last week's earthquake and tsunami in north-eastern Japan, which triggered devastation and a nuclear crisis in the region.