One story about a duel in the Edo period says that since both fighters bled too much to survive due to a long fight, they bravely killed each other by stabbing the opponent's throat at the same time by mutual agreement (this way of thinking was the same as kenka-ryoseibai [where there is a quarrel, both parties are to be punished], and people had intentions and considerations that both would not leave any feelings of regret or resentment).
江戸時代の決闘の話の一つに、闘いが長引き、両者とももう助からないほど流血した為、互いの同意で、潔く同時に喉を突き、相打ち死した（喧嘩両成敗と感覚は同じであり、互いに後悔や遺恨の念が残らない意図・配慮がある）。