In "Ashikaga Kiseiki" it was recorded as 'Amagasaki-no-jo' (Daimotsu-jo), but "Shinshu Osaka-shi Shi" (History of Osaka: new edition) vol. 2 describes that the Hosokawa Tenkyu family had its home base in Nakajima area but did not include the Amagasaki area, and it has therefore been identified that this may be an incorrect reference to Hori-jo Castle.
この時の様子を『足利季世紀』では「尼崎ノ城」（大物城）と記述されているが、『新修　大阪市史第２巻』によると細川氏典厩家の本拠は中嶋で尼崎は含まれていないので、堀城の誤りではないかと指摘している。