Yoshihiro SHIMAZU, who intended to establish his rule over Kyushu before Hideyoshi arrived, started to invade Chikuzen Province in June 1598 and brought the western half of the province under his control.
秀吉の到着前に九州統一を成し遂げたかった島津義弘は1586年（天正14年）6月筑前侵攻を開始、筑前の西半を制圧する。