How to Apologize for Being Late in Japanese: Polite and Casual Phrases
Learn beginner-friendly Japanese phrases to apologize for lateness in social and professional settings, including how to explain a delay and offer a remedy.

Being late happens, but in Japanese the way you apologize changes depending on who you are speaking to. This lesson teaches you how to say sorry for being late in two main registers: polite Japanese for work, teachers, and people you do not know well, and casual Japanese for friends and close peers. You will learn set phrases such as osoku narimashita and okuremashita, how to add a short reason, and how to offer a remedy like contacting someone in advance. The focus is only on lateness, so you can use these expressions right away without mixing them up with other kinds of apologies.
By the end, you can…
- apologize for being late in polite Japanese using osoku narimashita or okuremashita.
- give a short, simple reason for being late and offer a remedy such as contacting ahead.
Listen once. Try it slowly. Then say it without looking.
Checking available voices…
遅くなりました。
I'm late. / I've been delayed.
osoku narimashita
Polite, standard apology for being late. Use when arriving late to work, a meeting, or an appointment.
遅れました。
I was late. / I'm late.
okuremashita
Polite and slightly more direct than osoku narimashita. Common when you arrive after the scheduled time.
すみません、遅れます。
Sorry, I'll be late.
sumimasen, okuremasu
Use before you arrive, for example in a message or phone call, to warn someone that you are running late.
ごめん、遅れる。
Sorry, I'll be late.
gomen, okureru
Casual, used with friends, close classmates, or family. Do not use this with a boss or teacher.
電車が遅れています。
The train is delayed.
densha ga okurete imasu
A common short reason for lateness. Use after your apology, not instead of it.
Pronunciation guides are approximate. Slow playback keeps the original pitch.
Make it make sense
Useful pattern
A simple polite pattern is: apology + lateness phrase + short reason. For example, すみません、遅くなりました。電車が遅れています。 (sumimasen, osoku narimashita. densha ga okurete imasu.) This means 'Sorry, I'm late. The train is delayed.' You can also say 遅れました。すみません。 (okuremashita. sumimasen.) The order can change, but the apology should come early. If you are messaging before you arrive, use 遅れます (okuremasu), which means 'I'll be late.'
When to use it
Use polite forms such as 遅くなりました (osoku narimashita) and 遅れました (okuremashita) at work, in class with a teacher, or with someone you have just met. Use casual ごめん、遅れる (gomen, okureru) only with friends or close peers. If you know you will be late, send a message early: すみません、遅れます。 (sumimasen, okuremasu.) When you arrive, repeat a short apology: 遅くなりました。すみません。 (osoku narimashita. sumimasen.) This shows you value the other person's time.
Listen to each line, then take one part and reply out loud.
すみません、遅くなりました。
Sorry, I am late.sumimasen, osoku narimashita大丈夫ですよ。どうしましたか。
It's all right. What happened?daijoubu desu yo. dou shimashita ka電車が遅れていました。すみません。
The train was delayed. I'm sorry.densha ga okurete imashita. sumimasenそうですか。じゃあ、始めましょう。
I see. Well then, let's get started.sou desu ka. jaa, hajimemashouA little context goes a long way
In Japanese, a short apology for lateness is often expected even for a small delay, especially in work or school settings. Politeness is shown by apologizing first and then giving a brief reason. Long excuses can sound defensive. If you will be late, contacting the person before the scheduled time is usually appreciated more than explaining everything after you arrive.
One thing to watch for
Using casual ごめん、遅れる (gomen, okureru) with a boss or teacher.
Try this instead: Use polite Japanese instead: すみません、遅れます (sumimasen, okuremasu) before you arrive, or 遅くなりました。すみません (osoku narimashita. sumimasen) when you arrive. Casual forms are for friends and close peers only.
Your turn
Try answering out loud before checking a possible answer.
1You are about to arrive late to a work meeting. What polite phrase can you say when you arrive?
Show a sample answer
遅くなりました。すみません。
This uses the polite past form osoku narimashita plus sumimasen. 遅れました。すみません。 is also correct and natural.
2You are texting a friend to say you will be late. What casual phrase fits?
Show a sample answer
ごめん、遅れる。
Gomen, okureru is casual and appropriate for friends. With a teacher or boss, use すみません、遅れます instead.
3Give one short reason for being late in polite Japanese.
Show a sample answer
電車が遅れています。
This means 'The train is delayed.' Other valid reasons include バスが来ません (basu ga kimasen, 'the bus isn't coming'), but keep it short.
Apologize first, keep the reason short, and choose polite forms for work or school and casual forms for friends.
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