noun
Japan Trench
An oceanic trench in the northwestern Pacific Ocean, east of the Japanese archipelago. Used in geography and earth science contexts.
日本海溝は太平洋プレートが北アメリカプレートの下に沈み込む場所です。
The Japan Trench is where the Pacific Plate subducts beneath the North American Plate.
Compound of 日本 (Nihon, 'Japan') and 海溝 (kaikō, 'oceanic trench').