Thereafter, Josui began to capture various castles belonging to the feudal lords that had joined the West including Naomori KUMAGAI's Aki-jo Castle, Kazunao KAKIMI's Tomiki-jo Castle, Kazuyoshi OTA's Usuki-jo Castle, Takamasa MORI's Tsunomure-jo Castle and Hinokuma-jo Castle, Katsunobu MORI's Kokura-jo Castle, Nobutomo (信友) MORI's Kawaradake-jo Castle one after the other.
その後、如水は西軍に属した熊谷直盛の安岐城、垣見一直の富来城、太田一吉の臼杵城、毛利高政の角牟礼城と日隈城、毛利勝信の小倉城、毛利信友の香春岳城などを次々と落としていった。