Yoshiyuki Yamaguchi is a Japanese actor, renowned for his extensive work in V-Cinema and action-oriented roles. He began his professional training at the Japan Action Club (JAC) at the age of 16, developing skills in martial arts, stunts, and stage combat that have shaped his long career. He has appeared in a variety of V-Cinema films, with most prominent work being the ongoing Unification of Japan (日本統一) series (2013-present).