すいめんか 水面下 LinksSentence search for 水面下Sentence search for すいめんかKanji details for 水, 面 and 下Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. underwaterNoun, Noun which may take the genitive case particle 'no'2. behind closed doors; behind the scenes; below the surface Discussions Log in to talk about this word.