It is said that Oshikuma Prince killed himself in Seta, when the troops led by TAKEUCHI no Sukune, who was the retainer of Jinko Empress, (the mother of Ojin Emperor) attacked him (Nihonshoki [the chronicles of Japan, Princes OKINAGA Tarashi, Jinko Empress]).
忍熊皇子は神功皇后(応神天皇の母)の家来である武内宿禰の軍に攻められ、瀬田で自害したという(「日本書紀」気長足姫尊神功皇后)。