The government's package of measures to fight deflation has helped underpin the falling stock market.
As part of its antideflation measures, Tokyo bolstered its controls on short selling, triggering a flurry of activity to cover short positions on the market.
This activity sent share prices soaring along a broad front, leaving short sellers with huge losses.
With your current subscription plan you can comment on stories. However, before writing your first comment, please create a display name in the Profile section of your subscriber account page.