A double Olympic judo gold medallist was jailed in Japan Friday for raping a student, capping a terrible week for the sport after claims a national coach beat athletes with a bamboo sword. Masato Uchishiba was sentenced to five years in prison for the assault on a teenage member of a college judo club he was coaching, a court official said, after she drunkenly fell asleep in a Tokyo hotel. Uchishiba, 34, was feted as a national hero after bringing home a gold medal from the 2004 Athens Olympics, an achievement he repeated at the 2008 Beijing Games.