Sunpu Castle
In May 1689, Matsudaira Nobunari, the adopted son of the castellan of Sunpu Castle, and a "wakadoshiyori" in the Tokugawa Shogunate was elevated from his former "hatamoto" status of 4000 "koku", to "daimyō" status of 10,000 "koku", and assigned the territory of Ojima, to the east of Sunpu, to be his domain. He was also authorized to start his own branch of the Matsudaira clan, the .