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.

• Kazuhiro Mizoguchi at World Athletics

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