Since then, during 20 years, in the three provinces controlled by the Akamatsu clan, Harima, Bizen, and Mimasaku Provinces, all the permissions including Shoryo Ando (act of providing authorization for land ownership and guaranteeing feudal tenure) and Shoekimenjo (exemption of miscellaneous taxes) required a letter called 'Toshoinni Inbanjo' that had Tosho-in's signature and her black stamp that read 'Tsuhone.'
赤松氏の領国となっていた播磨・備前国・美作国の3ヶ国においては、以後20年間に渡り、所領安堵や諸役免除の許可はすべて、洞松院を表す「つほね」の署名と黒印が推された消息（洞松院尼印判状）によってなされた。