According to 'Taiheiki' (The Record of Great Peace) vol. 34, in the battle of the Tateishi-jo Castle, four young samurai including him carried out a night attack on Kusunoki and Wada, aiming to die by falling upon each other's swords.
「太平記」巻34.立石城戦に若党4人と楠木・和田と刺し違えて死ぬつもりで夜討ちに出た。