1965 worked for Nintendo, developing and designing games &; Watches, red and white machines, Game Boy, virtuoboy and other products. 1996 retired from society and set up a joint-stock company KOTO.
1997101October 4th, Junping Yokoi died in a car accident. At that time, because his car broke down, he got off to check the damage. During the inspection, he was knocked down by another car and died.