Nakayama's opinion was supported by Takeshi KAGAMIYAMA belonging to the 24th Infantry Regiment of the Imperial Japanese Army which was stationed at the ruins of Fukuokajo Castle, who gathered fragments of tiles used for Korokan while watching the ammunition depot.
福岡城址に駐屯する大日本帝国陸軍歩兵第24連隊に所属した鏡山猛が、弾薬庫の歩哨のかたわら鴻臚館の瓦の破片を採取したことも中山説の傍証となった。