The Tokyo Bay Aqua-Line , also known as the Trans-Tokyo Bay Expressway, is an expressway that is mainly made up of a bridge–tunnel combination across Tokyo Bay in Japan. It connects the city of Kawasaki in Kanagawa Prefecture with the city of Kisarazu in Chiba Prefecture, and forms part of National Route 409. With an overall length of 23.7 km, it includes a 4.4 km bridge and 9.6 km tunnel underneath the bay—the fourth-longest underwater tunnel in the world.
Umihotaru, where bridge transitions to tunnel
Tokyo Bay Aqua-Line bridge.
Tokyo Bay is a bay located in the southern Kantō region of Japan spanning the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. The Tokyo Bay region is the most populous and the largest industrialized area in Japan.
ESA Sentinel-2 image of Tokyo Bay
Tokyo Bay and Greater Tokyo at night (2018)
A panoramic view of northern Tokyo Bay facing Tokyo from Odaiba island
"Tsukuda Takeyo" in Katsushika Hokusai's famous picture collection "Thirty-six Views of Tomitake" In the latter half of the Edo period, you can see Mt. Fuji far from Tsukuda Island (currently Tsukuda, Chuo-ku, Tokyo) in front of Edo, which is crowded with ships.