A silhouetted bicycle ran between the trees extending from the bank of the Komatsugawa Natural Area ran past

Looking at the map, I noticed a facility called a lock on the Arakawa River, so I decided to go there. A lock is built between two rivers to adjust the water level to match the height of the water surface and allow ships to pass through. In layman's terms, it is an elevator between rivers with different water levels. Although I have the impression that many such facilities are installed in places with many canals, such as the Netherlands, I had no idea that there were such facilities in Tokyo. The difference in water level between the Arakawa River and the old Nakagawa River, which is connected by the Arakawa Lock Gate, is said to be as much as 3.1 meters.

After getting off the train at Higashi-Oshima Station on the Toei Shinjuku Line, I walked past the nondescript station and headed for the Komatsugawa Natural Area along the Arakawa River. From here, heading downstream on the Arakawa River, the Arakawa Lock Gate was not far away. Just as I was thinking that, I noticed something. There is a big sky without any buildings beyond the bank of the Arakawa River. You may think that this is a matter of course. But in Tokyo, there are not many places where you can see a sky like a cyclorama. In most cases, there is always something man-made in the sky. But here, there is no such thing. The only thing beyond the bank is the sky and clouds. I decided to leave the Arakawa River Lock Gate behind for a while and pointed my camera toward the bank.

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