Kazuhiro Mizoguchi (溝口 和洋, Mizoguchi Kazuhiro, born March 18, 1962 in Shirahama, Wakayama, Japan) is a Japanese former javelin thrower. He set the world best year performance in 1989, throwing 87.60 metres at a meet in San Jose, California, United States on May 27, 1989. Initially, it was announced as a new world record of 87m86, 20cm higher than the previous world record, but the measurer re-measured it with a plastic tape measure and announced it as 87m60.

International competitions

Representing  Japan
Year Competition Venue Position Notes
1983 Asian Championships Kuwait City, Kuwait 2nd
1984 Olympic Games Los Angeles, United States 20th 74.82 m
1985 Asian Championships Jakarta, Indonesia 3rd
1986 Asian Games Seoul, South Korea 1st
1987 World Championships Rome, Italy 6th 80.24 m
1988 Olympic Games Seoul, South Korea 19th 77.46 m
1990 Asian Games Beijing, China 3rd
1991 World Championships Tokyo, Japan 29th 73.78 m
1995 World Championships Gothenburg, Sweden 34th 68.66 m