既成概念 きせいがいねん Meanings Noun stereotype; preconceived idea; preconceived notion Kanji 既 already. Read as キ. 成 become. Read as セイ. 概 rough. Read as ガイ. 念 thought. Read as ネン. Common phrases 既成概念にとらわれない Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists