Tosa Kokubun-ji pertence atualmente à seita Shingon-shu Chisan-ha, embora tenha sido originalmente fundado em 741 e mudado de afiliação posteriormente.

Kūkai practiced secret hoshiku rituals here in 815 to ward off evil spirits. The temple became the main training hall for these esoteric teachings, and his statue is still called the Hoshi-ku Daishi.