Tokyo's benchmark index rocketed 7.71 percent on Wednesday, leading an Asian equities rally in its biggest one-day jump since late 2008 during the global financial crisis when markets were hit by wild volatility.

The Nikkei-225 at the Tokyo Stock Exchange soared 1,343.43 points to 18,770.51 by the close, while the broader Topix index of all first-section shares jumped 6.40 percent, or 90.66 points, to 1,507.37.