Hisamitsu's true intent was the political reform of the bakufu and Kobu Ichiwa (union of the shogunate and the imperial court, another way of calling Kobu Gattai) from the beginning, so he ordered the purge of the extremists of the domain such as Shinshichi ARIMA (Teradaya Incident on April 23).
久光の真意は、あくまで幕政の改革・公武一和であったため、これら志士たちとの間に摩擦を生じ、自藩の急進派有馬新七らの粛清を命じた（寺田屋事件、4月23日）。