 He also won a gold medal at the 1985 World Judo Championships, but retired to concentrate on his work as a teacher.He restarted his judo career in 1987 with a silver medal at the 1987 World Judo Championships, and retired after finishing with a bronze medal at the 1988 Summer Olympics.Hosokawa has served as an instructor for the Japanese Olympic Committee since April, 1997, where he coached many lightweight judoka, most notably 3-time gold medalist Tadahiro Nomura, whose father was Hosokawa's coach during high school.