We visit Nishi-Shinjuku, home to one of Tokyo's biggest clusters of skyscrapers. We learn how the buildings came to be built and uncover a centuries-long relationship with water, including the construction of a large treatment plant. Echoes of it still remain among today's towers. Omoide Yokocho, or Memory Lane, evolved from a post-war black market, and witnessed Japan's economic boom. Dive into the urban neighborhood of Nishi-Shinjuku.