Map of the Tamagawa-josui canal, a 43-kilometer aqueduct/canal running from Western Tokyo to the center. It is referenced in the following posts:

See: Walking on water: the underground rivers of Tokyo 東京の地下河川や運河の地図 (This is a description of the many underground waterways of Tokyo, including a section of the Tamagawa-josui that has been submerged)

See: ClearWater Nippon & splashing around Tokyo’s water infrastructure (Describes several of Tokyo’s fascinating elements of water infrastructure, including pictures of the source of the Tamagwa josui in Hamura)

See: The Kodaira Referendum: fighting for Democracy in the Acorn Forest (The story of a grassroots (and democratic) effort to halt the process of a road that would destroy a particularly beautiful section of the Tamagawa josui path, including the ‘Acorn Forest’)