How to Say “Become a Demon” in Japanese

鬼になる
To say "become a demon" in Japanese, you use 鬼になる.
While the phrase can literally describe transforming into a supernatural creature, 鬼になる can be used metaphorically to describe someone becoming extremely harsh, strict or ruthless in their behavior.

How does it change in a sentence?

To express that someone has already become a demon, use the past tense form 鬼になった. The te-form of 鬼になる is 鬼になって.

Did you know?

  • In Japanese children's games like tag, the person who is 'it' is called the 鬼, effectively meaning they 'become the demon' for the duration of the round.
  • During the Setsubun festival, people throw roasted soybeans while shouting Oni wa soto! to cast the 'demons' out of the house.
  • The phrase 鬼になる is related to the expression 鬼に金棒, which means 'giving a club to a demon' to describe someone who is already strong becoming invincible.

Examples in context

  • 彼は鬼になったようだ。
    It seems like he became a demon.

Example conversation

Two friends are talking about a coworker's intense personality.

  1. 結衣 Yui

    あの人の性格、本当に怖いよね。
    ano hito no seikaku, hontou ni kowai yo ne.
    That person's personality is really scary, isn't it?
  2. 大翔 Hiroto

    怒ると、まるで鬼になるみたいだよ。
    okoru to, maru de oni ni naru mitai da yo.
    When he gets angry, it's like he becomes a demon.
  3. 結衣 Yui

    大翔くんも、そんな風に見えることがある?
    hiroto-kun mo, sonna fuu ni mieru koto ga aru?
    Do you ever look like that too, Hiroto?
  4. 大翔 Hiroto

    僕はそんなに怖くないと思うよ。
    boku wa sonna ni kowaku nai to omou yo.
    I don't think I'm that scary.
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Michelle Dawn
Michelle DawnHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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