At the beginning, provisions were landed to Amagasaki-jo Castle and sent to Arioka-jo Castle, but as forts of troops of Nobunaga ODA were constructed one by one, the supply route via Amagasaki became inoperable.
当初は尼崎城に陸揚げされ有岡城に届けられていたが、次第に織田信長軍の砦が築かれると、尼崎ルートの補給路は使えなくなった。