Forbes updated their Japan's 40 Richest list and the new number one is retired Nintendo Chairman Hiroshi Yamauchi.

Mr. Yamauchi net worth has risen by $3 billion in the past year thanks to the mega success of the Nintendo Wii. His networth is now $7.8 billion.
The shares of Nintendo have more than tripled in the past two years and the video game company is now worth $79 billion.

Hiroshi Yamauchi owns still 10% of Nintendo.

Overall the 40 wealthiest Japanese Businesspeople are worth $89.9 billion, which is $10.7 billion more than last year.
More details in the Forbes Japan's 40 Richest list.