Public domain
Ryogoku Bridge Repair Records, Vol. 31 [13] Ryogoku Bridge and Three Bridges Repair Records, No. 3: Ryogoku Bridge and Azumabashi Pile Specifications and Breakdown, Ōkawa Bridge Repair and Extension Specifications, Kōka 4 (1847)
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Subjects
Credit line両国橋御修復書留 31巻 [13] 両国橋并三橋御修復書留三 両国橋并芥留杭仕様内訳帳・大川橋同断并仕増仕様書 弘化四未年. National Diet Library, Japan. Public domain.