A water taxi waits to pick up passengers next to the old Shimbashi bridge, on the Shiodome river 汐留川. (Seen here: “Ginza Harem”, presumably a nightclub of some sort.) This river has since been filled-in and a highway runs above much of it. See: Canals of the Ginza: floating through time on Tokyo’s central waterways 東京江戸「水の都」