どういつへいめんじょう 同一平面上 LinksSentence search for 同一平面上Sentence search for どういつへいめんじょうKanji details for 同, 一, 平, 面 and 上Edit in JMdict Noun which may take the genitive case particle 'no'1. coplanar; in the same plane; flush; even (with)often 同一平面上に Discussions Log in to talk about this word.