Quick and important lesson for everyone out there thinking about building their stock portfolio for when they retire...buy shares in Nintendo!! Former Nintendo President and Chairman, Hiroshi Yamauchi, is laughing all the way to retirement after having his net worth triple and his value rise by over $3 billion! All this can be attributed of course to the dizzying success of the both the DS and Wii doing ridiculous business everywhere in the world. In fact Hiroshi-san is sitting at the number one position of wealthiest people in the world according to the Forbes list of wealthy people in Japan...and trust us, Forbes would know :)