According to Saidai-ji Monjo (documents of Saidai-ji Temple in Nara City) and unearthed articles of mokkan (a narrow strip of wood on which an official message is written) in the latter half of the eighth century, it is considered that 'Koshi no kimi' was a name of Uji distributed in the southern part of Echigo such as Kubiki County, Koshi County, and so on in Echigo Province in ancient times.
8世紀後半の西大寺(奈良市)文書や木簡出土例などから「高志公」は古代の越後国頸城郡・古志郡など、越後南部に分布したウジ名と考えられる。