 This small peak and its slopes were to be a defense point for the Osaka-based army of Toyotomi Hideyori to defend against the approaching Eastern Army of Tokugawa Ieyasu.On June 3, 1615, Gotō Mototsugu, the commander of the samurai defending the peak was shot by a bullet from Tokugawa forces.He later committed ritual suicide on Komatsu-yama before his positions were overrun by the enemy.