In March, 1861, Iguchi-mura village sword wound incident occurred in Tosa, which deepened conflict between the lower-rank samurai to which Ryoma belonged and the upper-rank samurai (refer to "Ishin Tosa Kinnoshi" (History of Support of the Emperor in Tosa during the Restoration), which reads "SAKAMOTO and other lower-rank samurai temporarily gathered at IKEDA's house and showed their enthusiasm to fight against the upper-rank samurai").
1861年（文久元年）、3月、土佐で井口村刃傷事件が起り、龍馬の属する下士と上士の間で対立が深まる『維新土佐勤王史』「坂本等、一時池田の宅に集合し、敢て上士に対抗する気勢を示したり」。