Minamoto no Yoshiie
was son of famous samurai Minamoto no Yoshiie and an ancestor of the Ashikaga and Nitta clans. Yoshikuni was the samurai who first implored the spirit of the Iwashimizu Shrine to start living in this bamboo grove and he built the shrine in honor of the god Hachiman. His childhood name was Kugenmaru (普賢丸). He became a monk in 1154, dying two years later.