Hiroshi Hamaguchi (濱口 弘, Hamaguchi Hiroshi, born October 1, 1976) is a Japanese businessman and racing driver.

He won the 2019 FIA Motorsport Games GT Cup along with Ukyo Sasahara, driving a Lamborghini Huracán EVO GT3.

[1] (Races in bold indicate pole position) (Races in italics indicate fastest lap)