The Rainbow Bridge in Tokyo Bay is a symbol of the capital, but it is less known that the walkways of the suspension span offer great ocean views fringed by skyscrapers, including an island fortress built in the 19th century to defend against the American Black Ships that ended Japan's isolationism.

The bridge has a two-deck structure. The walkways are on the lower deck, along with the automated Yurikamome train line, while the upper deck is part of the Shuto Expressway.

Shibaura Anchorage, about five minutes' walk from Shibaura Futo Station on the Yurikamome Line, is the entrance to the walkways, which are free of charge and open from 9 a.m. to 9 p.m. between April and October and 10 a.m. to 6 p.m. between November and March.