とうかい 東海 Common word LinksSentence search for 東海Sentence search for とうかいKanji details for 東 and 海Edit in JMdict Noun1. Tōkai region; region south of Tokyo on the Pacific Ocean side of JapanNoun2. East Sea (Korean name for the Sea of Japan)Sensitive, See also 日本海 Discussions Log in to talk about this word.