Japanese Email and Message Writing: Choosing Formal vs. Informal Register
Learn to select the right level of formality in Japanese written communication, from business emails to casual texts, with key phrases and etiquette.
By TheaFirst conversations · Yapr Learn
In Japanese, the register you choose for written communication—whether a business email, a message to a friend, or a note to a colleague—signals your relationship and respect. Unlike spoken Japanese, where tone and context soften formality, writing requires explicit choices. This lesson teaches you to navigate between formal (keigo) and informal styles, focusing on greetings, closings, and honorific language. You'll learn to avoid common pitfalls and adapt your writing to different recipients.
By the end, you can…
- choose appropriate greetings and closings for formal and informal Japanese emails.
- use honorific and humble expressions correctly in written communication.
- adjust the level of politeness based on the recipient and context.
Listen once. Try it slowly. Then say it without looking.
Checking available voices…
拝啓
Dear Sir/Madam (formal letter opening)
Haikei
Used at the beginning of a formal letter, paired with a seasonal greeting and closed with 敬具. Rare in emails and casual writing.
お世話になっております
Thank you for your continued support (formal business greeting)
Osewa ni natte orimasu
Standard opening in business emails to external contacts. Shows respect and gratitude.
いつもお世話になっております
Thank you for your continued support (slightly more personal, implies an ongoing relationship)
Itsumo osewa ni natte orimasu
Used when you have an ongoing relationship. Common in follow-up emails.
よろしくお願いいたします
Thank you in advance / I look forward to your kind cooperation (formal closing)
Yoroshiku onegai itashimasu
Polite closing for business emails. The humble form of よろしくお願いします.
じゃあね
See ya (casual closing)
Jaa ne
Used in informal messages to friends. Avoid in professional contexts.
Pronunciation guides are approximate. Slow playback keeps the original pitch.
Make it make sense
Useful pattern
Formal letters typically follow a structure: opening (拝啓), seasonal greeting (e.g., 時下ますますご清栄のこととお慶び申し上げます), body, closing (よろしくお願いいたします), and signature. In business emails, 拝啓 is usually replaced by お世話になっております, and 敬具 by よろしくお願いいたします. In contrast, informal messages often skip greetings and use casual endings like だよ or だね. For example, a formal request might be: 資料を送付いただけますでしょうか。 (Would you please send the documents?) while informal: 資料送ってくれる？ (Can you send the documents?)
When to use it
Use formal register when writing to superiors, clients, or someone you don't know well. Use informal register with close friends, family, or peers in casual settings. For colleagues you're friendly with, a semi-formal style may work: お疲れさまです。 (Thank you for your hard work.) followed by casual content. Always err on the side of politeness in business; it's better to be too formal than too casual. For example, in a first email to a potential employer, use 拝啓 and 敬具, but in a Slack message to a teammate, お疲れさま！ is fine.
Listen to each line, then take one part and reply out loud.
お世話になっております。株式会社ABCの田中です。
Thank you for your continued support. I'm Tanaka from ABC Corporation.Osewa ni natte orimasu. Kabushiki gaisha ABC no Tanaka desu.お世話になっております。XYZ社の鈴木です。ご連絡ありがとうございます。
Thank you for your continued support. I'm Suzuki from XYZ Company. Thank you for contacting me.Osewa ni natte orimasu. XYZ-sha no Suzuki desu. Go-renraku arigatou gozaimasu.来週の打ち合わせについてですが、火曜日の午後はいかがでしょうか。
Regarding next week's meeting, how about Tuesday afternoon?Raishuu no uchiawase ni tsuite desu ga, kayoubi no gogo wa ikaga deshou ka.火曜日の午後は都合が悪いのですが、水曜日の午前中はいかがでしょうか。
Tuesday afternoon is inconvenient, but how about Wednesday morning?Kayoubi no gogo wa tsugou ga warui no desu ga, suiyoubi no gozenchuu wa ikaga deshou ka.A little context goes a long way
In Japanese business culture, the use of honorific language (keigo) in writing is crucial for maintaining harmonious relationships. It's not just about politeness; it reflects awareness of social hierarchy and group dynamics. However, overusing keigo in casual contexts can sound distant or sarcastic. Pay attention to the recipient's status and your relationship. Also, seasonal greetings are common in formal letters, so learning a few (e.g., 暑中お見舞い申し上げます for summer) can be impressive.
One thing to watch for
Using casual greetings like やあ (Hey) in a business email to a superior.
Try this instead: Use お世話になっております or 拝啓 instead. For example, start with お世話になっております、田中様。 (Thank you for your continued support, Mr. Tanaka.)
Your turn
Try answering out loud before checking a possible answer.
1What is the formal opening for a business email when you have an ongoing relationship?
Show a sample answer
お世話になっております
This phrase is standard for business emails to external contacts you've interacted with before. Alternatives like いつもお世話になっております are also acceptable.
2How would you close a casual message to a friend?
Show a sample answer
じゃあね
This is a common informal closing. Other options include またね or バイバイ, depending on the friend and context.
3Convert this formal request to informal: 資料を送付いただけますでしょうか。
Show a sample answer
資料送ってくれる？
The informal version drops honorifics and uses the plain verb form. Note that the particle を is often omitted in casual speech.
Always consider your relationship with the recipient and the context when choosing formal or informal Japanese in writing. When in doubt, lean formal—it's safer in professional settings.
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