LESSON NOTES · レッスンノート

N4Talking to real people · Sep 28, 2026

How to say you will be late in Japanese: the message matters more than the lateness

In Japan, arriving late is a small inconvenience; arriving late with no warning is the actual offense. The standard move is a short message sent before the original meeting time — 電車でんしゃが遅おくれていて、10分ぷんほど遅おくれます ("my train is delayed, I'll be about 10 minutes late") — that gives an apology and a concrete new arrival time, not an excuse alone.

Learners often reach for the reason first — traffic, a late train, an overrunning meeting — and treat that as the message. In Japanese, the reason is optional and the new arrival time is not. A text that explains why you're late but never says when you'll actually arrive leaves the other person exactly as stuck as silence would. This whole scene has a name, 遅刻ちこくの連絡れんらく (chikoku no renraku, "lateness contact"), and it's built around a simple rule: send it before the clock runs out, not after.

The basics

The core shape: apology + reason + new time

A basic lateness message has three parts, and the third one is the part that actually matters: すみません (sorry), an optional reason, and a specific new arrival estimate.

すみません、電車でんしゃが遅おくれていて、10分ぷんほど遅おくれます。 — Sorry, my train is delayed, I'll be about 10 minutes late. (polite, sent before the meeting time)

10分ぷんほど ("about 10 minutes") is doing the real work in that sentence. Even a rough estimate is far better than none, because it lets the other person decide whether to wait, start without you, or reschedule — a decision they can't make from an apology alone.

遅おくれます vs. 遅おくれそうです: certain vs. probable

遅おくれます states lateness as a fact; 遅おくれそうです ("it looks like I'll be late") softens it into a likely outcome, appropriate when you're not fully sure yet how late you'll be — still stuck in traffic, still waiting to see if the delay clears.

少すこし遅おくれそうです。状況じょうきょうが分わかり次第しだい、また連絡れんらくします。 — It looks like I'll be a little late. I'll update you as soon as I know more. (polite, uncertain situation)

状況じょうきょうが分わかり次第しだい、また連絡れんらくします ("I'll contact you again as soon as I know the situation") is the natural follow-up when you genuinely can't give a firm number yet — it promises a second message instead of leaving the estimate to guesswork. That 分わかり次第しだい is a ます-stem plus 次第しだい, and the 次第しだい pattern adds that the second half must be a plan you will carry out, as in 着つき次第しだい、ご連絡れんらくします.

Beyond the basics

The formal, business version

For a client, a boss, or a lesson you're paying for, the apology upgrades to 申し訳もうしわけございません, and the message states the cause and the new time as clearly as an official notice.

電車でんしゃの遅延ちえんにより、到着とうちゃくが15分ふんほど遅おくれます。申し訳もうしわけございません。 — Due to a train delay, I'll be about 15 minutes late arriving. I'm very sorry. (formal, business or client context)

電車でんしゃの遅延ちえんにより ("due to a train delay") is a formal, almost report-like way to state the cause — a step up from the plainer 電車でんしゃが遅おくれていて used in casual and semi-polite messages, matching the more careful register used across Japanese business vocabulary generally.

Apologizing again on arrival: it isn't optional

The message before arrival doesn't replace an apology once you actually show up — Japanese expects both. 遅おそくなりまして申し訳もうしわけございません ("I'm sorry for being late," formal) or the more neutral お待またせしました ("sorry to keep you waiting") are both said again at the moment you arrive, even if you already texted ahead.

遅おそくなりまして申し訳もうしわけございません。お待またせしました。 — I'm sorry for being late. Sorry to keep you waiting. (formal, said upon arrival)

Saying only one — the text before, or the apology on arrival, but not both — reads as half-finished. The advance text manages the other person's time; the apology on arrival closes the loop in person, and both jobs are expected.

The casual friend version

Between friends, the whole structure collapses into something short and immediate, often ending in an exclamation point in writing rather than a formal closing phrase.

ごめん、ちょっと遅おくれる!先行せんこうってて。 — Sorry, I'll be a bit late! Go ahead without me. (casual, to a friend)

先行せんこうってて ("go ahead without me," from 先さきに行いっていて, "go on ahead of me") is a small but important addition — it gives the other person explicit permission to start without waiting, removing any ambiguity about whether they should hold off.

先さきに注文ちゅうもんしといて! — Go ahead and order first! (casual, telling someone not to wait for you before ordering)

The same 先さきに ("ahead, before someone else") shows up any time you're giving that same permission — to start eating, to head into a venue, to begin a meeting — without you.

Why silence is the real problem, not the lateness itself

The cultural weight in this whole topic sits on 連絡れんらくもなく遅おくれる — "being late with no contact at all." A five-minute delay with a message is minor, and still deserves an apology on arrival; the same five minutes with total silence reads as inconsiderate, because it leaves the other person unable to plan around you. This is a variant of the same logic behind apologizing in Japanese more broadly: すみません and its relatives are less about admitting fault and more about acknowledging that you've caused someone else inconvenience — and lateness without a message maximizes exactly that inconvenience.

Common mistakes

  • Sending no message at all and only apologizing on arrival. The silence itself is the offense in Japanese, independent of how late you actually end up being.
  • Giving a reason without a concrete new arrival time. "電車でんしゃが遅おくれていて" alone tells the other person why, but not what to do about it — always attach a time estimate.
  • Using casual ごめん in a business or client message. Formal contexts call for 申し訳もうしわけございません, matching the higher-stakes register of the situation.
  • Skipping the apology on arrival because you already texted ahead. Both the advance message and the in-person apology are expected — one doesn't replace the other.
  • Overpromising a specific time you can't actually meet. A slightly padded, realistic estimate is more trustworthy than an optimistic one you have to revise twice.

Lateness phrases by situation

Phrase Situation Register
ごめん、ちょっと遅おくれる! Texting a friend, informal Casual
すみません、〜分ふんほど遅おくれます Standard advance notice Polite
少すこし遅おくれそうです Uncertain, still-developing delay Polite
電車でんしゃの遅延ちえんにより、到着とうちゃくが〜分ふんほど遅おくれます Business, client-facing Formal
遅おそくなりまして申し訳もうしわけございません Said in person, upon arrival Formal

FAQ

Is it better to call or text if I'm going to be late in Japan? A short text or message app note is standard and expected for routine lateness; a call is reserved for something more serious, like being unable to attend at all or a much longer delay.

Do I need to give a reason, or is the apology enough? A reason is optional and appreciated, but the new arrival time is the part that actually matters — a message with a time but no reason is far more useful than a reason with no time.

What if I don't know exactly how late I'll be yet? Use 遅おくれそうです ("it looks like I'll be late") instead of the more definite 遅おくれます, and add 状況じょうきょうが分わかり次第しだい、また連絡れんらくします to promise a follow-up once you know more.

Should I still apologize in person if I already texted before arriving? Yes — the advance message and the apology on arrival are both expected. Skipping the in-person one because you already texted reads as incomplete.

Is five minutes late really considered a big deal in Japan? Not if you send a message. The actual offense is silence, not the five minutes; the same delay handled with no warning is what reads as inconsiderate.

Practice

1. "Sorry, my train is delayed, I'll be about 10 minutes late."

Show answer

すみません、電車でんしゃが遅おくれていて、10分ぷんほど遅おくれます。 — The specific time (10分ぷんほど) matters more than the reason for making this message useful.

2. "It looks like I'll be a little late. I'll update you as soon as I know more."

Show answer

少すこし遅おくれそうです。状況じょうきょうが分わかり次第しだい、また連絡れんらくします。 — 遅おくれそうです softens the message when you're not yet certain how late you'll be.

3. "Due to a train delay, I'll be about 15 minutes late arriving. I'm very sorry." (business)

Show answer

電車でんしゃの遅延ちえんにより、到着とうちゃくが15分ふんほど遅おくれます。申し訳もうしわけございません。 — 電車でんしゃの遅延ちえんにより is the formal, report-like way to state the cause for a client or boss.

4. "I'm sorry for being late. Sorry to keep you waiting." (said in person, on arrival)

Show answer

遅おそくなりまして申し訳もうしわけございません。お待またせしました。 — This is expected even if you already sent a message beforehand — it doesn't replace the in-person apology.

5. "Sorry, I'll be a bit late! Go ahead without me." (casual, to a friend)

Show answer

ごめん、ちょっと遅おくれる!先行せんこうってて。 — 先行せんこうってて explicitly gives permission to start without waiting.

6. Why is a message that gives a reason but no time considered incomplete?

Show answer

Because it doesn't let the other person plan — they can't decide whether to wait, start, or reschedule without a concrete estimate.

7. Fix this business lateness message: 電車でんしゃが遅おくれてます、ごめん。(too casual for a client)

Show answer

電車でんしゃの遅延ちえんにより、到着とうちゃくが〜分ふんほど遅おくれます。申し訳もうしわけございません。 — Swaps the casual ごめん and vague 電車でんしゃが遅おくれてます for the formal register and a specific time.

8. What is the actual "offense" in Japanese lateness culture, according to this article?

Show answer

Being late with no message at all (連絡れんらくもなく遅おくれる) — a delay with a warning is minor, though it still deserves an apology on arrival; the same delay in silence reads as inconsiderate.

9. True or false: texting ahead means you don't need to apologize again once you arrive.

Show answer

False. — Both the advance message and the in-person apology on arrival are expected; one does not replace the other.

10. When should you use 遅おくれそうです instead of 遅おくれます?

Show answer

When you're not yet certain how late you'll be — 遅おくれそうです softens the statement into a likely outcome rather than a fixed fact.

The message you send before you are late is the part that counts, so practise writing and saying 10分ぷんほど遅おくれます in a trial lesson until you can do it without scrambling.

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.

遅刻	ちこく — being late, tardiness
遅れます	おくれます — will be late (definite)
遅れそうです	おくれそうです — it looks like I'll be late (uncertain)
遅延	ちえん — a delay (trains, transport, formal)
到着	とうちゃく — arrival
申し訳ございません	もうしわけございません — I'm very sorry (formal)
お待たせしました	おまたせしました — sorry to keep you waiting
連絡	れんらく — contact, a message, notice
先に	さきに — ahead, before someone else
状況	じょうきょう — the situation, circumstances

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, and the one habit I push hardest with students isn't the exact apology wording — it's sending the message before the clock runs out, not after.

Book a trial lesson · $13

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

More drills like the ones above, plus a timed JLPT-style mock test: Practice · N4 · Read something at this level: JLPT N4 stories with audio

More “Talking to Real People” articles →

Want to try this in a real conversation?

30-minute trial lesson, $13. Times shown in your own timezone.

Practice it out loud with a Tokyo native. ★5.0 from 358 italki reviews.

See how the lessons work →

Book a trial lesson · $13