While it may be temporary, the major risks we see for Japanese stocks right now are the Iranian situation and currency moves. That's still going to keep a lid on the market.

(The takeover) helps us to anticipate future restructuring in the retail sector. For example, we cannot imagine that rival Aeon will not do anything after this.

Technology shares here got a lift from strong gains in the Nasdaq index as many investors here regard this sector as having lagged last year.

This market just keeps going and going and people are betting on even further gains. Strength in economic fundamentals is the biggest incentive.

I had expected a market correction of an almost 10 percent fall sometime between January and March.

Relatively speaking, Japan looks the least uncertain market in regard to politics and the economy.

When a catastrophic event happens, such as the Hurricane Katrina, there is always rebuilding demand after the disaster and that tends to be reflected in stock prices.

The fact that investors are chasing commodity stocks on the back of higher oil prices, instead of selling stocks outright, suggests that market sentiment is quite strong.

A sudden jump in trading volume like this would catch off-guard any exchange (in industrialized countries). I'm sure they will fix it.