Japan’s two-time Olympic judo gold medallist Masato Uchishiba has been jailed for five years for raping a student he had been coaching.Uchishiba had maintained that sex with the teenager in 2011 was consensual, but the court in Tokyo ruled he had assaulted her while she was asleep.The verdict is the latest scandal to hit Japanese judo this week.The national women’s team coach Ryuji Sonoda resigned following accusations he had beaten his students.Mr. Sonoda, an Olympic gold medallist himself, said allegations that he had slapped the women and used a wooden sword to discipline them while they were training for the 2012 London Olympics were “more or less true”.He apologised and has received an official warning, the Kyodo news agency reported, as had other coaching staff.Japan’s Sports Minister Hakubun Shimomura has ordered the country’s Olympic Committee to investigate allegations of abuse in the sport.