下野國
In addition, all nine elder brothers, except Tametaka, supported the Taira clan, and Tametaka was later punished, so Yoichi succeeded the family estate of the Nasu clan, although he was the eleventh son. It is said that Yoichi pardoned his older brothers who had escaped to various places such as Shinano, gave them territory, and laid the foundation for the development of the Nasu clan in Shimotsuke Province.