Sumiyoshi

Sumiyoshi is an ancestor of the Kamado family and a friend of Yoriichi Tsugikuni, the creator of Sun Breathing. He developed the Hinokami Kagura from a demonstration Yoriichi gave to him and his family, as a promise to preserve Sun Breathing through his descendants, and received from Yoriichi the Hanafuda earrings that Tanjiro Kamado wears.