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 "The archives of Kutsuki family" consist of historical documents passed down in the family through the years.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).
Tairano Mitsunori was assigned to serve as Jito, an administrative official for Yohoro-mura in the Kurahashi area of Tango (presently Maizuru City) on August 3, the 3rd year of Kencho (1251). Fujiwarano Yoritsugu was the 5th shogun of the Kamakura shogunate government, and Mutsunokami (Lord of Mutsu) Tairano Ason and Sagaminokami (Lord of Sagami) Tairano Ason in this record stand for Hojo Shigetoki and then Shikken Hojo Tokiyori respectively. "Shikken" is the highest position in this shogunate government.