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 "The archives of Kutsuki family" consist of historical documents passed down in the family through the years.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).
A "sodehan kudashibumi" from Ashikaga Yoshimitsu (1358 - 1408), the third shogun in the Muromachi period, dated 22 August in the 3rd year of Eiwa( 1377). It authorizes Sasaki (Kutsuki) Ujihide to administer the domain of Harihata within the Kutsuki manor, in the Takashima district of Omi Province.