When Yoshimoto IMAGAWA was defeated by Nobunaga ODA of Owari Province in the Battle of Okehazama, Naomori II followed the Imagawa clan side and was killed in the battle.
今川義元が尾張国の織田信長に敗れた桶狭間の戦いの際に井伊直盛は今川氏に従い討ち死にした。