JAPAN TRENCH(noun) Did you mean: Synonyms Rhymes Definitions There is 1 meaning of the phrase Japan Trench. Japan Trench - as a noun A depression in the floor of the pacific ocean to the northeast of japan that reaches depths of 30,000 feet Word Variations & RelationsAnagrams Starts J Starts JA Starts JAP Starts JAPA Ends H Ends CH Ends NCH Ends ENCH Starts J & ends H Starts JA & ends H Starts J & ends CH A-Z Proximitiesjanty 15januaryjanusjanus-facedjapan 14 Japan Trench japanesejapanese-speakingjapanesenessjapanise 17japanised 19