- Born:27 March 1992 (25 years)
Ruika Sato won her first Grand Slam in 2010 in Rio, followed by the Grand Slam victory in Tokyo. She collected more than 10 international medals at Grand Prix and Grand Slams, all U78kg. Sato won World Junior bronze in 2008 U78kg. National champion in 2013 and 2014. Silver at the Paris Grand Slam. She won the Grand Slam in Tokyo in 2016. She won silver at the Grand Slam in Paris and Grand Prix bronze in 2017 in Hohhot. She won bronze at the Grand Slam in Tokyo in 2017.