LESSON NOTES · レッスンノート

N5Lesson notes · Sep 30, 2026

Take care in Japanese: 気きをつけて, お大事だいじに, and which one fits the goodbye

Japanese has no single "take care" — you pick the phrase by the situation: 気きをつけて for someone heading out, お大事だいじに for someone who is sick, お元気げんきで for a long goodbye, and ご自愛じあいください for the end of a letter or email.

English lets one small phrase cover all of those. Japanese splits it into four, and each one is a little wrong outside its own moment. Say お大事だいじに to a friend leaving for the station and they will wonder if they look ill. This article sorts the phrases by what is actually happening when you say them.

The basics

How do you say "take care" to someone who is leaving?

Say 気きをつけて (きをつけて). It literally means "put your attention on it" — be careful — and it is the everyday "take care" for someone about to head out, travel, or go home.

気きをつけてね。 — Take care. (casual, friends and family) お気きをつけて。 — Please take care. (polite, customers, seniors, guests) 気きをつけて帰かえってね。 — Get home safe. (casual, at the end of an evening)

The お adds respect. For extra formality, use お気きをつけください. In practice, staff at shops and stations say お気きをつけて constantly.

There is a second thing to know: 気きをつけて is also the warning "watch out!" The same words, said sharply, mean "careful!" Tone tells you which one you are getting. When something is already falling, people shout 危あぶない instead, and be careful in Japanese explains why 気きをつけて comes too late for that moment.

What do you say to someone leaving the house?

If the person is walking out of the home or workplace where you are staying, the set phrase is 行いってらっしゃい (いってらっしゃい) — "go and come back." The person leaving answers 行いってきます (いってきます).

行いってらっしゃい。 — Have a good day. / See you later. (everyday, said to someone leaving home) 行いってきます。 — I'm off. (everyday, the reply)

This pair is one half of a greeting ritual, and it is not really about safety at all. It is closer to "we will see you again." For the other half of the ritual, see ただいま and おかえり.

What do you say to someone who is sick?

Say お大事だいじに (おだいじに). It comes from 大事だいじ (だいじ), "important, precious," so the feeling is "treat your body as precious." It is the standard sendoff at clinics, pharmacies, and phone calls with a sick friend.

お大事だいじに。 — Get well soon. / Take care. (polite-neutral, the standard for illness or injury) お大事だいじにしてください。 — Please take good care of yourself. (polite, a step warmer and slightly longer) ゆっくり休やすんでね。お大事だいじに。 — Get lots of rest. Take care. (casual-polite, to a sick colleague or friend)

You say お大事だいじに to the sick person, not about them. It also works for an injury, and it is fine to say it to a stranger who sneezes at the counter and mentions a cold. If you want the vocabulary around being ill, see how to say sick in Japanese; the word 大事だいじ itself is unpacked in daiji and taisetsu.

Beyond the basics

What do you say when you will not see someone for a long time?

For a longer separation — someone moving abroad, a friend leaving town, the end of a term — 気きをつけて feels too small. The natural choices are:

元気げんきでね。 — Take care. / Stay well. (casual, a real goodbye) お元気げんきで。 — Take care of yourself. (polite, a real goodbye) 体からだに気きをつけてね。 — Take care of your health. (casual, said to someone going far or into a hard stretch)

元気げんき means "healthy, energetic," so 元気げんきでね wishes the person a good life until you meet again. Here is the catch that trips up learners: お元気げんきで is heavy. It suggests "we may not meet again for a long while." Saying it to a coworker at the end of Friday sounds oddly final. For ordinary goodbyes, use またね or じゃあね instead, which are covered in how to say goodbye in Japanese.

Anime uses this contrast on purpose. In a departure scene at a station or an airport, you will often hear 元気げんきでね precisely because the goodbye is meant to hurt a little. In a slice-of-life morning scene, it is 行いってらっしゃい and 気きをつけてね, light and quick. Fans use 元気げんき in a brighter way too: このアニメから元気げんきをもらった ("this anime gave me energy") is praise, and 元気げんき and energy notes that 元気げんきをもらう is said about singers and athletes as well.

What do you write at the end of an email or a letter?

In writing, especially to someone older or to a business contact, the standard closing wish is ご自愛じあいください (ごじあいください). 自愛じあい means "caring for oneself," and the phrase is a written-register "please look after your health."

寒さむい日ひが続つづきますので、どうぞご自愛じあいください。 — It's been cold lately, so please take care of yourself. (formal, written closing) ご自愛じあいのほどお願ねがい申し上もうしあげます。 — I sincerely hope you will take care. (very formal, business letters)

ご自愛じあいください is usually tied to a season or a hardship: cold weather, the heat of summer, a busy period. It is almost never said out loud, and using it face to face sounds like reading a letter aloud. Do not use it for someone who is currently sick; it is a preventive wish, and お大事だいじに is the phrase for a person who is already unwell. A warmer closing for letters and emails is お体からだに気きをつけてください, and body in Japanese warns against using it to close a very casual chat, since it is slightly formal.

What if "take care" means "be careful of something"?

That is a different pattern: 〜に気きをつける (to be careful of ~). The thing you are watching out for takes the particle に, not を.

車くるまに気きをつけて。 — Watch out for cars. (casual, warning or parting words) 足元あしもとに気きをつけてください。 — Please watch your step. (polite, announcements and shop staff) 風邪かぜをひかないように気きをつけてね。 — Be careful not to catch a cold. (casual, caring reminder)

So there are really two patterns hiding behind the same verb: 気きをつけて on its own means "take care" to a departing person, and Xに気きをつけて names the danger. Both are natural, but only the second one has a slot for a noun.

The whole map

Situation Japanese Politeness
Someone is heading out or traveling 気きをつけてね Casual
Same, to a customer or senior お気きをつけて Polite
Someone leaving home or work 行いってらっしゃい Everyday, neutral
Someone is sick or injured お大事だいじに Polite-neutral
Sick, more warmly お大事だいじにしてください Polite
Long separation, friend 元気げんきでね Casual
Long separation, polite お元気げんきで Polite, heavy
Health advice for a hard stretch 体からだに気きをつけてね Casual
Email or letter closing ご自愛じあいください Formal, written
Watch out for a specific danger 車くるまに気きをつけて Casual

Common mistakes

  • Using お大事だいじに as a general goodbye. It only fits illness or injury. Said to someone who is fine, it sounds like you noticed something wrong with them.
  • Saying お元気げんきで at the end of a normal day. It signals a long separation. Save it for movers, graduates, and people you truly will not see soon.
  • Saying ご自愛じあいください out loud. It is a written phrase. Aloud, use 体からだに気きをつけてね or お大事だいじに depending on the situation.
  • Saying 車くるまを気きをつけて. The particle is に: 車くるまに気きをつけて. This one is easy to fix once you remember that 気きをつける points at the thing you watch out for.
  • Replying to 行いってらっしゃい with 気きをつけて. If someone says 行いってらっしゃい to you, you are the one leaving: answer 行いってきます.

FAQ

What is the most common way to say "take care" in Japanese? 気きをつけてね (casual) or お気きをつけて (polite). It is the default when someone is leaving, going home, or traveling.

Can I say お大事だいじに to someone who is not sick? It sounds odd. If you want to send someone off with care and they are healthy, use 気きをつけてね or 体からだに気きをつけてね.

Is 気きをつけて the same as "be careful"? Yes, in the warning sense. Said with force it means "careful!" and with a smile it means "take care." Add に and a noun (車くるまに気きをつけて) to say what you are watching out for.

What do I say when someone says 行いってらっしゃい to me? Answer with 行いってきます, literally "I'll go and come back."

Is ご自愛じあいください too formal for an email to a friend? Yes, usually. For a friend, close with 体からだに気きをつけてね or お大事だいじに (if they are sick) instead. ご自愛じあいください suits clients, teachers, and older relatives.

Practice

Build each answer before opening it. Questions 8 and 9 are a pair that tests the に/を trap.

1. A coworker is heading out to a meeting in the rain. What do you say, in polite Japanese?

Show answer

お気きをつけて — the polite way to send off someone leaving. The お adds respect.

2. A friend tells you they have a bad cold. Which phrase fits?

Show answer

お大事だいじに — it is the sendoff for illness. 気きをつけて would suggest a trip instead.

3. Your host family member leaves for work in the morning. What do you say?

Show answer

行いってらっしゃい — the set phrase for someone leaving home. They will answer 行いってきます.

4. A close friend is moving abroad tomorrow. What is a natural casual goodbye?

Show answer

元気げんきでね — it wishes them well for a long separation. 気きをつけて alone would feel too small for this goodbye.

5. You are ending a formal email to a client in winter. What is the standard closing wish?

Show answer

ご自愛じあいください — the written-register "please look after your health," usually tied to a season.

6. Why is お元気げんきで a poor choice for a coworker at the end of a normal Friday?

Show answer

It signals a long separation. Between coworkers who will meet again on Monday, it sounds strangely final. Use お疲つかれさまでした or またね instead.

7. Say "Please watch your step" politely.

Show answer

足元あしもとに気きをつけてください — the danger (足元あしもと) takes に, and ください makes it polite.

8. Fix this sentence: 車くるまを気きをつけて。

Show answer

車くるまに気きをつけて — 気きをつける takes に for the thing you watch out for, not を. This is the pair to question 9.

9. Someone says 車くるまに気きをつけて to you. What are they asking, compared with just 気きをつけて?

Show answer

They are naming a specific danger: cars. Plain 気きをつけて is a general "take care" for a departing person; with に and a noun, it points at one thing to avoid.

10. Can you say ご自愛じあいください to someone who is sick in bed right now?

Show answer

It is better not to. ご自愛じあいください is a preventive wish in writing. For a person who is already unwell, お大事だいじに or お大事だいじにしてください is the natural phrase.

In a trial lesson, say goodbye to someone heading out, someone who is ill and someone leaving for a long time, using 気きをつけて, お大事だいじに and お元気げんきで.

Vocabulary from this article

Tap the block to select all of it, then copy. In Anki: File → Import, note type Basic, separator Tab — the first column becomes the front, the second the back.

気をつける	きをつける — to be careful, to take care
お気をつけて	おきをつけて — please take care (polite)
行ってらっしゃい	いってらっしゃい — have a good day (to someone leaving home)
行ってきます	いってきます — I'm off (reply)
お大事に	おだいじに — get well soon
大事	だいじ — important, precious
元気	げんき — healthy, energetic
お元気で	おげんきで — take care (long goodbye, polite)
体	からだ — body
ご自愛ください	ごじあいください — please take care of your health (written)
足元	あしもと — where you step
風邪	かぜ — cold (illness)
車	くるま — car

I'm Yuuki, a Japanese teacher based in Tokyo. I've taught on italki as a Top 1% teacher and watched over 1,500 anime, so most of the example sentences on this blog come from lines I've actually heard students ask about — including this one, since learners meet 気きをつけて and お大事だいじに within their first few weeks. For practice with feedback, Book a trial lesson · $13, or work through Japanese practice exercises first.

Sources: the author's own lessons and standard reference grammars.

More drills like the ones above, plus a timed JLPT-style mock test: Practice · N5 · Read something at this level: JLPT N5 stories with audio

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