Development of Shoreline Protection Structures

Of the total 763km of shoreline along Tokyo Bay and the Tokyo islands, the Bureau has designated about 46km along 26 coasts, including areas at high risk of damage from waves and those that have been severely eroded, as shoreline preservation areas, and is constructing shoreline preservation structures such as revetments and artificial reef there. These measures aim to protect the land from waves generated by typhoons and seasonal winds to both ensure the safety of homes, public facilities, and others, and preserve the shoreline environment.

Construction of an artificial reef
(Nagahama beach on Kozushima Island)


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