It is said that the Navy planned to move the Headquarter of the third Air Corps of the Aviation Fleet to Yanagimoto, since the Navy was on the alert for the landing on Ki Peninsula in the homeland defense war.
本土決戦時に紀伊半島への上陸を警戒した海軍は、航空艦隊第三航空艦隊司令部を柳本に進出する計画を持っていたといわれる。