Ariake Sea

Body of salt water off the coast of Kyūshū, Japan

The Ariake Sea (有明海, Ariake-kai) is a body of salt water surrounded by Fukuoka, Saga, Nagasaki, and Kumamoto Prefectures, all of which lie on the island of Kyūshū in Japan. It is the largest bay in Kyūshū. Its deepest point is only about 20 meters deep, and extreme tides exceed 4 meters (13 ft), covering roughly 1,700 square kilometres (660 sq mi).

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