What is happy birthday in Japanese?

Answer 1

You can say 私の誕生日おめでとう : 'watashi no tanjoubi omedetou'.

Answer 2

誕生日おめでとう！

In all hiragana, that's たんじょうびおめでとう

The romaji for this is "tanjoubi omedetou". In case you are not familiar with romaji, the "ou" is a long "oh" sound, not an "ow" sound.

Answer 3

A direct translation (only for friends) of 'happy birthday' would be 　

Japanese with Kanji- 誕生日おめでとう　
Hiragana only - たんじょうびおめでとう
Romanji - tanjou-bi Omedetou

A polite form (for your boss or co-worker) of happy birthday would be

Japanese with Kanji- お誕生日おめでとうございます
Hiragana only - おたんじょうびおめでとうございます
Romanji - otanjou-bi Omedetou gozaimasu

In most situations where you want to be polite you should put a お (o) before 誕生日 (tanjoubi)

adding the ございます (gozaimasu) is optional for politeness, however if you use this with a close friend it will seem somewhat cold.

Below is the old answer, the Japanese doesn't match the English letters at all...

Tanjoubi omedetou gozaimasu

誕生日おめでとう!

Otanjou-bi Omedetou Gozaimasu!
You may say '(o)tanjoubi omedetou.'
お誕生日おめでとうございます : 'otanjoubi omedetou gozaimasu'.
(hapibaz de) ハッピーバースデー
You may say '(o)tanjoubi omedetou.'
shiwase tanjobi

Answer 4

お誕生日おめでとうございます : 'otanjoubi omedetou gozaimasu'.

Answer 5

You can say 'maemotte otanjoubi omedetou gozaimasu'.

Answer 6

Happy Birthday

otanjou-bi omedetou

おたんじょうび　おめでとう

お誕生日おめでとう

Answer 7

otanjobi omeditoo

Answer 8

ハッピー名の日

Happī-namae no hi