After the Battle of Hetsugigawa, Iehisa SHIMAZU, who was his younger brother, left Funai-jo Castle in Bungo which he had occupied and retreated to Matsuo-jo Castle (Hyuga Province) which was located further backward, and Yoshihiro SHIMAZU, who was his older brother, moved to Funai-jo Castle in Iehisa's place to reinforce the defenses.
戸次川の戦い後に義久の弟・島津家久が占領していた豊後府内城から家久は後方の松尾城(日向国)に撤退し、代わって島津家久の兄・島津義弘が府内城に入って守備を固めたのである。