Kaishu KATSU is the one who also praised Ryoma SAKAMOTO, and it is easy to imagine that KATSU as a former vassal of the Shogun had some resentment against the Satsuma-Choshu clique.
勝海舟も坂本龍馬を持ち上げたひとりであるが、旧幕臣という立場で薩長閥に対する反発があったのは、想像に難く無い。