In the Sengoku period (period of warring states), Omizo was governed by vassals of Nobunaga ODA such as Kazumasa ISONO and Nobusumi TSUDA (Nobunaga's nephew).
戦国時代(日本)、大溝は織田信長の家臣・磯野員昌や津田信澄（信長の甥）が治めていた。