The reason was that 'if castles are sold to former castellans, who have connections to the castles that had been inherited from their ancestors over the past several hundred years, and the castellans are to preserve the shapes of the castles and hand them down to later generations, the castles would show part of the course of our history, which is favorable.'
「旧城主は祖先以来数百年間伝来の縁故により、これを払い渡し旧形を保存し、後世に伝えるなら歴史上の沿革を示す一端となり好都合である」ことを理由とした。