There exists another example that a large ship, which was about 55m in length, about 13m in width, and equipped with 100 oars and watchtowers at the bow and the stern, was built in Sawayama, the lake side of Biwako Lake in 1573 on the order of Nagahide NIWA (from Shincho-koki).
また天正元年（1573年）には琵琶湖湖畔の佐和山において、丹羽長秀の指揮のもと、長さ三十間（約55m）幅７間（約１３ｍ）櫓百挺立て、軸櫓に矢倉を設けた大船が建造された例が存在する（信長公記より）。