They decided to run away from the bakufu's pursuers, go to Kyoto, and through Yoshinobu HITOTSUBASHI, appeal the Imperial Court their wish of Sonno Joi.
幕軍の追っ手から逃れると共に、京都に上り一橋慶喜を通じて朝廷へ尊皇攘夷の志を訴えることを決した。