On September 13, when the edict of imperial visit from Yamato Province was given out, he stated that he would obey the orders of the vanguard for the principle of excluding foreigners, and left Kyo, and together with YOSHIMURA he attacked the magistrate's office in Yamato Gojo, and raised an army (Tenchu-gumi incident).
8月13日に大和国行幸の詔が出されると攘夷論先鋒の勅命を奉じると称して退京し、吉村らと共に大和五條の代官所を襲撃して挙兵した（天誅組の変）。