The value of Nintendo shares held by Yamauchi, the company’s largest single shareholder and great-grandson of the founder, tumbled as much as 42 billion yen ($540 million) after the stock’s plunge today in Osaka trading. Yamauchi, 83, owned 14.17 million shares, or 10 percent of Kyoto-based Nintendo, as of March 31, according to regulatory data compiled by Bloomberg.

Yamauchi, who ran Nintendo for 53 years, was Japan’s sixth- richest man with an estimated fortune of $4.6 billion, according to Forbes magazine’s latest rich list. The former owner of the Seattle Mariners baseball team led the Forbes Japan rich list in 2008.

http://www.bloomberg.com/news/2011-07-29/nintendo-s-yamauchi-loses-500-million-in-single-day-after-plunge-in-stock.html

Wow, Nintendo are being hit hard, this just hasn't been their month. I want Reggie to lose money, he seems like the one who should lose money.....

ok i've been on Nintendo's ass all day so i'll give it a rest and say this is really fucked up?

Well he was richest because of Nintendo as well. Wonder what his take on this is.

It's a lot of money but to him, probably just chump change.

That guy is seriously rich! O.o

You definitely have to change your avatar. I can never see what you're writing. :D

On topic: I'd love to be rich enough to be able to lose 500M $. That's just insane.

Golly, that's alot of cash!!! 0.o

just going with the numbers in the article.  500M of 4.6B would be  ~10.8% of his fortune.  he won't go hungry over this but a 10% change would be rather noticiable. 

He's 83. He'll have forgotten about it by tomorrow.