Happy Birthday in Japanese: 誕生日 おめでとう！ongekoku omedetou!

Happy Birthday is a special day celebrated all around the world — and in Japan, it carries its own unique charm and warmth. Whether you're celebrating with family, friends, or colleagues, expressing birthday wishes in Japanese adds a meaningful touch. In this article, we’ll explore everything from the meaning of birthday in Japanese culture to authentic phrases, traditions, and tips for making your birthday celebration truly memorable in birthday style.

Understanding the Context

What Is Birthday in Japanese?

In Japanese, birthday is called:

  • 誕生日 (tanjōbi — pronounced: tan-jō bi)
    This literal translation means “date of birth” and is commonly used in formal and everyday contexts.

There’s also a more casual or affectionate way to refer to a birthday:

happy birthday in japanese

Key Insights

  • おむねん (omunen) — shortened from お体の celebrations (お体の-side), widely used among friends and close circles.

How Do You Say Happy Birthday in Japanese?

To wish someone a happy birthday in polite Japanese, the standard phrase is:
お誕生日おめでとう！ (otanjōbi omedetō!)

Breakdown:

  • お（o-）: A polite prefix (similar to “Mr.” or “Ms.”)
  • 誕生日（tanjōbi）: Birthday
  • おめでとう（omedetō）: Literally “good fortune,” used for celebrations

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ight) \Rightarrow (x \mid 0)
Analysieren wir:
Die Prämisse: „Für alle $ y $, wenn $ x \mid y $, dann $ y \mid x $“ — das bedeutet, dass $ x $ ein *algebraisch vollständig teilender* Integer ist, d.h. $ x $ ist ein *regulärer* Integer, nur $ \pm1 $ und $ 0 $ häufig erscheinen, aber formal gilt:

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Time = 8 min 20 sec = 500 seconds Distance = speed × time = \( 3 \times 10^8 \, \text{m/s} \times 500 \, \text{s} = 1.5 \times 10^{11} \, \text{m} \) Convert to km: \( 1.5 \times 10^{11} \, \text{m} = 1.5 \times 10^8 \, \text{km} = 150,000,000 \)

Final Thoughts

Common complete birthday greeting:
👉 お誕生日おめでとう！ (otanjōbi omedetō!) — Happy Birthday!
For a longer, expressive wish:
👉 お誕生日おめでとうございます！ (otanjōbi omedetō gozaimasu!) — A more formal and heartfelt “Happy Birthday.”

Other Birthday Phrases and Expressions

Want to add nuance to your birthday wishes? Try these phrases depending on the relationship:

  • 元気な誕生日を！ (genki na tanjōbi o!) — “Have a healthy birthday!” (common among friends/family)
  • 一日も長くお過ごしください！ (ipuriten o nagaku osugoshite kudasai!) — “May you enjoy every moment of the day!”
  • 大幸せに！ (taishūsei ni!) — “May you be happy!” (casual but sincere)
  • 誕生日おめでた~！ (otanjōbi omedetō~!) — Adding a cute emoji or elongated “~” to sound warmer and more playful

Unique Japanese Birthday Traditions

Japanese birthday celebrations often blend modern customs with traditional sincerity:

1. Kinenbi no Birūden (Personalized Birthday Card)

Many Japanese people receive handmade birthday cards (ningen card) filled with heartfelt messages and appreciation — a gesture deeply rooted in omotenashi (Japanese hospitality).

2. 黒塗りケーキ (Kuro Nori Kākī) – Black Layer Cake

A popular (and slightly dramatic) birthday cake trend is the kuro nori kaēki — a cake layered with dark chocolate or black buttercream to symbolize maturity and progress.