Kazuhiro Mizoguchi (溝口 和洋,Mizoguchi Kazuhiro, born March 18, 1962 inShirahama,Wakayama,Japan) is a Japanese formerjavelin thrower. He set the world best year performance in 1989, throwing 87.60 metres at a meet inSan 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.