is a retired Japanese judoka.
Career Masuchi is from Tsu, Mie. He began judo at the age of a 10 and after graduation from Tsukuba University, He belonged to Marunaka and Nippon Steel.
He became Asian champion of openweight category in 1994, 1997. He also participated All-Japan Judo Championships 13 times, and the record is the most in history.
Masuchi is on the faculty of his alma mater Tsukuba University, and has served as the judo coach of the women's national team.
Personal life Masuchi's wife, Chiyori is a bronze medalist at the 1992 Summer Olympics in judo. Their son, Ryotaro, won a gold medal in judo at the 2026 Asian Games.
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