Also it was the incident that forced the Imperial Court to change its policy drastically from 'Joi' (expulsion of foreigners) to 'Opening of a country to the world and amity.'
また、朝廷がこのときまで唱えていた「攘夷」（外国を討ち払う）政策を「開国和親」へと一気に方針転換させた事件でもあった。