@maku.en.kurisu: Tokyo's shield from flooding. The metropolitan area outer waterway is one of the largest underground waterways in the world built to prevent flooding. When small and medium-sized rivers such as the Nakagawa River, the Kuramatsu River, the Orakuko Tone River, the No. 18 Waterway, and the Komatsu River flood, part of the floodwater can be flowed into the spacious Edo River. #fyp

Maku & Kurisu 🇵🇭🇯🇵❤️

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Wednesday 04 March 2026 01:45:27 GMT