The Kutsuki were a branch of the Sasaki family hailing from Omi Province. They served as the stewards of the Kutsuki manor in that province in the Kamakura period, and the house continued through the Warring States period and into the Edo period, when some of their members became bannermen (direct vassals of the shogun) or daimyo (provincial lords). "The archives of Kutsuki family" consist of historical documents passed down in the family through the years. The Cabinet Records Bureau purchased them from the Kutsuki in 1888. Containing more than 1,060 documents, the archives were designated an important cultural property in the first year of Heisei( 1989).
This is a deed of transfer dated 24 October in the 5th year of Shouou(1291), written by Ama Myogo, the mother of Sasaki Yukitsuna. In it, Myogo states that she is disowning her undutiful son Yukitsuna and transferring her property to her nephew Yorinobu. Together with the letter of compromise involving Ama Shin'a, it underscores the economic independence and the strong voice of women of the samurai class in the medieval period.