This is a part of Kanda River that was used as the outer moat of Edo Castle, which is now the Tokyo Imperial Palace.
Kanda River is a 24.6km river that flows through 9 cities of Tokyo, including Shinjuku. It was unfortunately also known as a river that would always overflow when a typhoon came. But in the 1980s they implemented a flood control system through underground regulating reservoirs and diversion channels, which drastically brought down the chances of any flooding. Thank goodness!
Hope you are all having a wonderful Friday and enjoy your weekend to come!
Enjoy looking at more beautiful skies all around the world here.