When Nagaharu disturbed Awa by his misrule, Saneyoshi planned to regain his position by linking up with Motochika CHOSOKABE, who started gain power in Tosa, and eliminated Nagaharu.
長治が悪政により阿波を混乱させると、真之は新たに台頭しつつあった土佐の長宗我部元親と手を結び復権を図り、長治を滅ぼした。