It was well known that Yoshio OISHI, the chief retainer, collected han bills in exchange for silver coins at a high rate (60 percent of the face values) and controlled social unrest when the Genroku Ako incident happened.
元禄赤穂事件の際に、家老の大石良雄がすぐさま藩札を額面の6割交換という高い率の銀正貨で回収し、城下の混乱を抑えた話はつとに有名である。