Mutsu, who was taken under the wings of Kaishu KATSU and SAKAMOTO, exerted his abilities in such a way that SAKAMOTO was led to say: 'Only Mutsu and I can live without wearing two [swords].'
勝海舟と坂本の知遇を得た陸奥は、その才幹を発揮し、坂本をして「二本差さなくても食っていけるのは、俺と陸奥だけだ」と言わしめるほどだったという。