同一平面上 どういつへいめんじょう Meanings の-adjective coplanar; in the same plane; flush; even (with) (often 同一平面上に) Kanji 同 same. Read as ドウ. 一 one. Read as イツ. 平 flat. Read as ヘイ. 面 face. Read as メン. 上 up. Read as ジョウ. Jinuma: Japanese Dictionary · Word lists