The Difference Between 「お越しください」と「いらしてください」の違い｜Japanese Grammar (N5–N3)

(Joy welcoming a guest to her home [Irashite] vs. Joy bowing to a client at an event [Okoshi])

“Please come to our office.” -> お越しください (Okoshi kudasai) “Please come to my house.” -> いらしてください (Irashite kudasai) Both are respectful ways (Sonkeigo) to say “Please come” (来て). However, Japanese changes depending on whether you are doing business or warmly welcoming someone to a personal event. Let’s master the tone of Keigo with Joy and Ken!

🗣 Conversation Scene

Joy is hosting a home party and wants to invite Ken’s parents.

Joy

ケンさん、今週末（こんしゅうまつ）のホームパーティー、ぜひご両親（りょうしん）も招待（しょうたい）してください！「私の家にお越（こ）しください」と伝（つた）えてくださいね！ (Ken, please invite your parents to the home party this weekend too! Tell them: “Please ‘okoshi kudasai’ to my house”!)

Ken

ありがとうございます！でもJoyさん、家（いえ）に呼ぶときは「いらしてください」の方がいいですよ。「お越しください」だと、お店や会社のイベントみたいで少し硬（かた）いです。 (Thank you! But Joy, when inviting someone to your home, “Irashite kudasai” is better. “Okoshi kudasai” sounds like a shop or corporate event, it’s a bit stiff.)

💡 Explanation

Business/Formal vs. Warm/Conversational

1. いらしてください (Irashite kudasai) = Please come (Soft)

Tone: Polite, Elegant, Welcoming, Spoken 🏠 Originates from “Irassharu” (いらっしゃる). It shows respect but has a soft, conversational tone. It is perfect for inviting seniors, teachers, or respected acquaintances to personal events (like a home party or a casual dinner).

今度、ぜひ私の家にいらしてください。 (Please come to my house next time.)
先生、明日のパーティーにいらしてくださいね。 (Teacher, please come to tomorrow’s party.)

2. お越しください (Okoshi kudasai) = Please come (Formal)

Tone: Highly Formal, Business, Written 🏢 Originates from “Kosu” (越す – to cross over). It carries the nuance of thanking someone for making the effort to travel a distance to see you. It is standard for business emails, shop greetings, and formal invitations.

ぜひ、弊社のオフィスへお越しください。 (Please come to our office. *Business Email*)
またのお越しをお待ちしております。 (We look forward to your next visit. *Shop Staff*)

📊 Comparison Table

Expression	Nuance	Best Used For
いらしてください (Irashite kudasai)	Soft, Warm, Conversational	Inviting to your home, speaking to a senior you are close with.
お越しください (Okoshi kudasai)	Sharp, Formal, Professional	Business emails, Corporate events, Customer service.

🚧 Joy’s Mistake

(Joy is writing an email to a new, important corporate client) ❌ Wrong: 明日の会議（かいぎ）は、私たちのオフィスに いらしてください。 (Nuance: It sounds a bit too casual/spoken for a formal business invitation. It lacks the sharp professionalism expected in B2B emails.) ✅ Right: 明日の会議は、弊社のオフィスに お越しください。 (Nuance: “Please take the trouble to come to our office.” Very professional and polite.)