Shinya Katabuchi (片渕 慎弥, Katabuchi Shin'ya, born 24 October 1983) is a Japanese judoka. He was born in Kishiwada, Osaka, and began judo at the age of 8. He entered the Japan Racing Association after graduating from Kokushikan University. On December 9, 2007, he defeated world champion Teddy Riner at Jigoro Kano Cup Judo World Grandprix.