How to say "ditto" in Japanese

• 同上どうじょうCommon
  nounA common written 'ditto': use it in forms, tables, and lists to mark an entry as the same as the one above, like 'ditto' or 'ibid.' in English.
• 同前どうぜん
  nounA less common synonym of 同上 with the same written use — 'same as above; ditto; ibid.' — for marking that an entry repeats the one above; 同上 is normally the better choice.
• 同断どうだん
  na-adjective, nounCovers 'ditto' in the sense of agreement: saying 'the same' about someone else's statement or opinion. It is less common, so learners will seldom need it.
• 右に同じみぎにおなじ
  expressionLiterally 'the same as (what is) to the right,' this echoes what someone has just said — 'like he said,' 'same for me.' It is less common; in conversation it works as a spoken 'ditto.'
  あなたが言いうのは「右みぎに同おなじ」だけ、それは「愛あいしてる」とは違ちがう。↗

  You say "ditto", and that's not the same as "I love you".

For the written 'same as above / ibid.' sense use 同上 (同前 is a less common equivalent); for agreeing with someone — 'same here' — use 「右に同じ」 or 同断, both less common.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 同上どうじょうsame as above
• 同前どうぜんsame as above
• 同断どうだんthe same
• 右に同じみぎにおなじlike he said