Satomi clan
In October 1572, after having concluded alliances with his rivals to the east (the Later Hōjō clan of Odawara and the Satomi clan of Awa), and after waiting for the snow to close off the northern mountain passes against his northern rival, Uesugi Kenshin, Takeda Shingen led an army of 30,000 men south from his capital of Kōfu into Tōtōmi Province, while Yamagata Masakage led a second force of 5,000 men into eastern Mikawa Province. They quickly captured Yoshida Castle and Futamata Castle.