It is considered that Kanno-ji Temple at that time had many sacred buildings in the area wider than today and had a good view of Ikeda City, Toyonaka City and Amagasaki City and, according to "Kyodo no Shiro Monogatari" (literally, story of castles in home town), it is recorded that Kannoji-jo Castle and Jurinji-jo Castle were castles for signal fire and used to inform movements of troops of Nobunaga ODA with signal fire.
当時の神呪寺は現在より広範囲に寺院があったと思われ、池田市、豊中市、尼崎市まで眺望がきき、『郷土の城ものがたり』によると神呪寺城、鷲林寺城は烽火城で織田信長軍の動きを烽火で知らしていたとも記している。