Tatsuta wajū sluice gates
The Tatsuta wajū sluice gates (立田輪中人造堰樋門, Tatsuta-wajū jinzōseki-himon) were constructed in 1902 during works on the Kiso River in Yatomi, Aichi Prefecture, Japan. They are an example of western hydraulic engineering technology adopted during the Meiji period.
Source: Wikipedia — Tatsuta wajū sluice gates (CC BY-SA 4.0)