How to Say “Be a Good Boy” in Japanese

いい子にしてね
ii ko ni shite ne
The English phrase "be a good boy" is translated into Japanese as いい子にしてね (ii ko ni shite ne).
This phrase is a request for a child to behave well and be obedient. Although the English phrase specifies "boy," the Japanese term ko (child) is gender-neutral, meaning these Japanese expressions can be used for both boys and girls.

What does it mean word for word?

Literally, いい子にしてね means 'do (be) in the state of a good child'.

Which one should you use?

While いい子にしてね is a gentle request, the form いい子になれよ translates to "Become a good child" and is more informal. For a more formal command, you can use 良い子になりなさい, which means "Become a good child."

How does it change in a sentence?

You can modify the phrase to change the tone or emphasis. Removing the final particle ne to create いい子にして turns the gentle request into a direct command. To emphasize an ongoing state of behaving well over a period of time, use the continuous form いい子にしていてね.

How do you pronounce it?

ii ko ni shite ne

Did you know?

  • While いい子にしてね is used for children, adults sometimes use いい子 sarcastically to describe a person who is overly naive or too obedient to the point of being gullible.
  • The word 子 (child) can be used in Japanese to describe animals, meaning a parent might say いい子にしてね to a pet during a vet visit.
  • Japanese culture often emphasizes the group over the individual, so いい子 implies not just obedience to a parent, but the ability to read the air and not disturb others.

Examples in context

  • お留守番はいい子にしてね。
    Orusuban wa ii ko ni shite ne.
    Be a good boy while I'm out.
  • お医者さんの前ではいい子にしてね。
    Oishasan no mae de wa ii ko ni shite ne.
    Be a good boy in front of the doctor.
  • パパが帰るまで、いい子にしてね。
    Papa ga kaeru made, ii ko ni shite ne.
    Be a good boy until Papa comes home.

Example conversation

A father is leaving his daughter with a babysitter.

  1. 蓮 Ren

    陽葵、いい子にしてね。
    Himari, ii ko ni shite ne.
    Himari, be a good girl.
  2. 陽葵 Himari

    うん、わかったよ!
    Un, wakatta yo!
    Yeah, I got it!
  3. 蓮 Ren

    おもちゃでたくさん遊んでね。
    Omocha de takusan asonde ne.
    Have lots of fun with your toys.
  4. 陽葵 Himari

    パパ、早く帰ってきてね。
    Papa, hayaku kaette kite ne.
    Daddy, come home soon.
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Loretta Toni
Loretta ToniHelp 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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