- Born:4 April 1994 (24 years)
Japanese judoka Seidai Sato won the Grand Prix of Jeju in 2015 as a complete surprise. He was Japanese junior champion in 2014 and became World team champion in 2014 in Fort Lauderdale. He won silver at the Grand Slam in Tyumen in 2016.
Competitions - Medal overview B S G
- IJF World Tour: Masters/Grand Slam/Grand Prix 011
- International Tournaments 001
- National Championships Seniors 300
- National Championships Juniors 001