異口同音 いくどうおん Also written いこうどうおん Meanings Noun, の-adjective (saying) with one voice; unanimously; in chorus; in unison; as one (usu. adverbially as 〜に) Kanji 異 different. Read as イ. 口 mouth 同 same. Read as ドウ. 音 sound. Read as オン. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists