Upon sensing the landing of Hideyoshi, Shimazu's army almost abandoned northern Kyushu, and Hideyoshi captured castles ruled by the Shimazu clan instantly, partly because the rule by the Shimazu clan was nothing more than a formal rule by occupation forces.
秀吉上陸を察知した島津軍は北部九州を半ば放棄、島津氏の支配が表面的な占領軍政に過ぎなかったこともあり、瞬く間に島津氏の支配している城を陥落させる。