いや
iya[ija̠]
The Japanese way to say no casually is いや (iya).
いや is a simple and versatile way to say "no" in Japanese. It is used to express disagreement or dislike in a casual setting.
Which one should you use?
While いや is used in casual conversation, the standard and more polite way to say "no" is いいえ. Other variations include ダメ for a straightforward refusal in informal contexts, and 無理 which means "impossible" and is used when something is completely out of the question.
Is there a formal and an informal way to say it?
いや is an informal expression. For a more polite or standard way to say no, you should use いいえ.
How does it change in a sentence?
You can turn the word into a complete sentence by adding the copula だ to make いやだ, which means "I don't want to" or "It is unpleasant".
How do you pronounce it?
iya
Did you know?
- The word いや might not just be a word, but a natural sound of disgust similar to the English 'yuck'.
- One theory suggests いや is a compound of い meaning 'existence' and や meaning 'weak'.
Examples in context
- いや、それはちょっと違うよ。Iya, sore wa chotto chigau yo.No, that's a bit different.
- いや、今日は行けない。Iya, kyou wa ikenai.No, I can't go today.
- いや、そんなの嫌だよ。Iya, sonna no iya da yo.No, I don't like that.
Example conversation
Two friends are discussing plans for the weekend.
- 結衣 Yui明日、一緒に映画を見に行かない？Ashita, issho ni eiga o mi ni ikanai?Want to go see a movie together tomorrow?
- 蓮 Renいや、明日は忙しいんだ。Iya, ashita wa isogashii n da.No, I'm busy tomorrow.
- 結衣 Yuiじゃあ、日曜日はどうかな？Jaa, nichiyoubi wa dou kana?Then, how about Sunday?
- 蓮 Renいや、日曜も予定があるよ。Iya, nichiyou mo yotei ga aru yo.No, I have plans on Sunday too.
Sources
- Pronunciation: Wiktionary entry いや, CC BY-SA 4.0, dump of 2026-09-26.
- Word origins: Wiktionary entries いや, CC BY-SA 4.0.
