English: Ookashiwagawa river (in north area of Ichikawa city, Chiba Japan), 1st regulating pondage (left end: overflow or overtopping bank intend to water flow from river to pondage, center: visitors house), Photo on 25 May 2008
Ookashiwagawa river (in north area of Ichikawa city, Chiba Japan), 1st regulating pondage (left end: overflow or overtopping bank intend to water flow from river to pondage, center: visitors house), Photo on 25 May 2008