Since Shinran (Jogen no Honan), engaged in his missionary work mainly in the Kanto region; after deportation to Echigo, Monto followers who got the teachings of Shinran built up in Kanto region.
親鸞は越後流罪後（承元の法難）に関東を拠点に布教を行ったため、関東に親鸞の教えを受けた門徒が形成されていく。