After seizing the nearby Ganjaku castle, controlled by a retainer to the Akizuki, Hideyoshi turned his attention to the Akizuki clan's home castle. As his army approached and prepared for the siege, however, Akizuki Tanezane, the lord of the castle, escaped and fled in the night.
Following the capture of Ganjaku castle, Hideyoshi shifted his focus to the Akizuki clan's stronghold. As his army drew near and prepared for a battle, however, Akizuki Tanezane, the ruler of the fortress, made a swift escape into the night.