- Born:1 November 1993 (24 years)
World Ranking leader Chizuru Arai won the world title in 2017 in Budapest as well as the first World mixed team title. She had won the World Team title with Japan in 2013. She was silver medallist of the World Juniors in 2013 in Ljubljana U70kg and won the Euro Open in Sofia and Grand Prix Dusseldorf in 2015. In 2013 she had already won the Grand Slam of Tokyo and Grand Slam in Tyumen in 2016. In 2017 she won the Grand Slam in Paris and Grand Prix Düsseldorf. She took silver in Tokyo.