Next year, at the time of the arrival of Commodore Perry from the United States, he spearheaded the royalists who looked for Sonno Joi (slogan advocating reverence for the Emperor and the expulsion of foreigners) with calling for opposition to the treaty and Joi Movement (the Movement advocating reverence for the Emperor and the expulsion of foreigners), and criticized shogunate government fiercely.
翌年、アメリカ合衆国のマシュー・ペリーが来航すると条約反対と外国人排斥による攘夷運動を訴えて尊皇攘夷を求める志士たちの先鋒となり、幕政を激しく批判した。