Japan Trench
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The Japan Trench is an oceanic trench, a part of the Pacific Ring of Fire, in the floor of the northern Pacific Ocean off northeast Japan. It extends from the Kuril Islands to the Bonin Islands and is 9,000 m (30,000 ft) at its deepest. This trench was created when seafloor spreading occurred to build an underwater mountain. (deep-ocean trench)
On August 11, 1989 the Shinkai 6500 three-person submersible descended to 6,526 m (21,414 ft.) while exploring the Japan Trench.
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