Shimazu's army of over 20,000 strong, including Yoshihiro and Iehisa, launched an assault against the forces entrenched on the Nejirozaka; howerver, they were repulsed, suffering heavy casualties, and eventualy were routed in the fighting (the Battle of Nejirozaka).
島津軍は後詰として、義弘・家久など2万余人が根白坂に一斉に攻め寄せたが、島津軍は多くの犠牲を出し、敗走した（根白坂の戦い）。