Yoriyuki HOSOKAWA successively took the post of Chugoku Kanrei (shogunal deputy for the Chugoku region) and Shikoku Kanrei (shogunal deputy for the Shikoku region), and promoted the provincial allotment of Shikoku, including these provinces of Sanuki, Awa and Tosa.
細川頼之は中国管領、四国管領を歴任し、讃岐国・阿波国・土佐国など四国の分国化を進めた。