Tokyo Bay

Tokyo Bay

is a bay in the southern Kantō region of Japan. Its old name was .


Tokyo Bay is surrounded by the Boso Peninsula (Chiba Prefecture) to the east and the Miura Peninsula (Kanagawa Prefecture) to the west. In a narrow sense, Tokyo Bay is the area north of the straight line formed by the on the Miura Peninsula on one end and on the Boso Peninsula on the other end. This area covers about 922 km². Tokyo Bay in a broad sense includes also the Uraga Channel. The total area would then be 1320 km².

Tokyo Bay includes about 249 km² of reclaimed land area.

The only natural island in the Bay is , Yokosuka, Kanagawa. There are however many artificial islands built as naval fortification during the Meiji and Taishō period.


The ports of Tokyo, Chiba, Kawasaki, Yokohama, and Yokosuka are all located on Tokyo Bay. The port of Yokosuka contains the naval bases of United States Forces Japan and the Japan Maritime Self-Defense Force.

On the western coast of Tokyo Bay, between Tokyo and Yokohama, the Keihin Industrial Area has been developed since the Meiji Era. This was expanded to the Keiyo Industrial Area along the north and east coasts after World War II.

The Tokyo Bay Aqua-Line bridge/tunnel crosses Tokyo Bay between Kawasaki and Kisarazu; Tokyo-Wan Ferry also crosses the bay toward the Uraga Channel between Kurihama (in Yokosuka) and Kanaya (in Futtsu on the Chiba side).


Tokyo Bay was the venue for Commodore Matthew Perry's early negotiations with the Japanese bakufu in the 1850s, as well as most official Japanese-European contacts preceding the Meiji Restoration.

The Japanese Instrument of Surrender at the end of World War II was signed onboard USS Missouri moored in the Bay on 2 September 1945. During the ceremony a flag from one of Perry's ships was flown.



See also

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