Inside Meiji government, there were heated debates over civilization and enlightenment, over technical and cultural import through the policy of encouragement of new industry and over Seikanron (debate on subjugation of Korea) to dispatch Japanese troops to Korea, which were led by the government itself, and the resignation of Takamori SAIGO, Shinpei ETO and Taisuke ITAGAKI after the political upheaval of the 6th year of Meiji influenced the thought of people from warrior class.
また、明治政府が行う文明開化、殖産興業政策による西洋技術・文化の輸入、朝鮮出兵を巡る征韓論で政府が紛糾し、明治六年の政変で西郷隆盛、江藤新平、板垣退助らが下野すると士族層に影響を与えた。