Revenue of the Matsumae clan including the lord and retainers in its early days, was from the trade with Ainu, therefore, the Matsumae clan prohibited the trade between other Japanese and Ainu.
初期の松前藩の収入は、藩主・家臣ともにアイヌとの交易にあったため、松前藩は他の日本人とアイヌとの取引を禁止した。