Kenichi Yamamoto may refer to:
Kenichi Yamamoto (engineer) (1922-2017), Japanese mechanical engineer and President of Mazda Kenichi Yamamoto (mixed martial artist) (born 1976), Japanese mixed martial arts fighter Kenichi Yamamoto (skier) (1922–2002), Japanese cross country skier Kenichi Yamamoto (yakuza) (1925–1982), founder of the Yamaken-gumi gang