Kohei Oguchi (小口耕平, Oguchi Kōhei) (born Saitama Prefecture, 6 October 1968) is a Japanese former rugby union player.
After graduating from Daito Bunka University, where he played in the All-Japan University Rugby Championship, Oguchi joined the Ricoh club, where he played throughout all of his career.
He was first capped for Japan on 7 June 1997, against United States, in San Francisco.
Oguchi was also called up in the 1999 Rugby World Cup squad coached by Seiji Hirao, playing two matches in the tournament.
[2] His last cap for Japan was against South Korea, in Aomori, on 2 July 2000.