|March 2012 (35.787 Degrees, 139.734 Degrees) Confluence of the Sumida River|
There is another gate behind me (the Iwabuchi Sluice Gate in the photo below) that can stop the water in the Arakawa from entering the Sumida.
We've looked at about 33 bridges across the Sumida River from it's mouth in Tokyo Bay to it's source at the Arakawa 30 km upstream. If I counted all the utility bridges and the clusters of bridges separately, the number would be closer to 40. I put the locations of these bridges on the Google Earth photo below. The area of the map is about 15 miles by 5 miles or 75 square miles, which is just a small part of Tokyo.
Tokyo, Japan's Bridges: Confluence of the Sumida River by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.