Tosa Kokubun-ji appartiene oggi alla setta Shingon-shu Chisan-ha, sebbene sia stato originariamente fondato nel 741 e abbia cambiato affiliazione in seguito.

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.