Though the Kanamari clan were originally the native bushi of the Province of Awa as well as hikan (low-level bureaucrats) of the Uesugi clan, they started to serve the Uesugi family in Echigo Province.
神余氏は元々上杉氏の被官で安房の国人であったが、何らかの理由で越後上杉家に仕えるようになった。