He became a leader of the radical faction in Edo and sent a letter to Oishi Kura-no-suke, who secluded from society in Yamashina Ward, Kyoto, to ask him to travel down to Edo.
江戸急進派のリーダー格となり、京都山科区に隠棲した大石内蔵助に対して江戸下向するよう書状を送り続けた。