Yoshimura made a plan to raise an army for overthrowing the Shogunate in Yamato Province together with like-minded people including Keido MATSUMOTO and Tesski FUJIMOTO as a vanguard of the imperial visit to Yamato.
吉村は松本奎堂、藤本鉄石ら同志とともに大和行幸の先駆けとして大和国で倒幕の義兵を挙げることを計画。