How to say "oh" in Japanese

• あっJLPT N4approx.Common
  interjectionThe pure exclamation: a short 'oh' of sudden surprise or realization, as when you notice something or remember something. It is not the 'oh, I see' reply to information someone gives you.
  あっ、いけない！忘わすれるところだった！↗

  Oh, no! I almost forgot!
• そっかCommon
  interjectionA colloquial 'oh, right' or 'oh, I see' said in response to what someone has just told you, acknowledging or accepting the information. Best kept to casual conversation.
  「そっか。暇ひまなら掃除そうじしといて」「なんだそれ。兄貴あにきをアゴで使つかうなよ」↗

  "Oh? If you're free get the cleaning done." "What's up with that? Don't order your brother around!"
• そうかCommon
  expressionThe same 'oh, I see' or 'oh, right' reaction to information someone gives you, but less colloquial than そっか, so it is the safer choice when you are unsure how casual to be.

Use 「あっ」 for a sudden exclamation of surprise or realization, and 「そっか」 or 「そうか」 for the 'oh, I see' reply to information someone tells you, with 「そっか」 the more colloquial of the two.

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

• あっah
• そっかoh
• いやoh
• おっoh
• ほうoh
• はっoh
• ありゃoh
• ほほうhuh!
• あれhuh?
• じぇじぇじぇoh
• いやんoh
• オフフックoff hook (line)
• なんだwhat!
• 飛んでとんでzero
• そうかI see
• とびzero
• ふふんI see
• やあやあoh
• いようwow
• かoh
• なにoh, no (it's fine)
• やo
• 何々なになにno
• さあhere
• なんのno