The Nikkei Stock Average has renewed its all-time high, which was reached at the height of the bubble economy. Strong performance of Japanese companies and investors' expectations for corporate transformation are behind the rise in stock prices.

Some are wary of overheating as stock prices have been rising at a rapid pace since the beginning of the year. We asked experts and economists how they view current stock prices, along with the data that serves as the basis for their judgments. The current stock price level is appropriate and is not in a bubble, experts say.