Isoi demo asettemo karamawari
Yume nante awatete sagasu monjanai
Hito no tame dare no tame tte wake ja naku
Tada jibun no iro ga egakeba ii
Motto daitan de wagamama de aimai de kamawanai sa
Kitto seikai wa hitotsu ja nai bankai wa
Itsunattattesou dekiru!

Hitotsu hitotsu omoi wo basudei keiki (birthday cake) ni tomosou
Itsuka ooki na hikari ni natte terashidasusa it's your dreams
Suki ni nareru koto kara shippai wo osorezuniyukou
Arukihajimeta sono hi no kimi e
Happy birthday to you

Zasetsushite nayanderu hito ga ita
Yuwabe dake no kotoba de hagemashitatte
Hontou no yasashisa wa onaji dake
Kanashimi wo seou wa nakya wakaranai
Motto kantan de arugamamade
Doukan de kamawanai sa
Kitto koukai wa saki ni konai nandatte tsumekondatte sugu wasure

Itsumo itsumo tanoshii koto bakari janakutemo ii sa
Koeteikanaikya kawarenai koto
Kanarazu kuru brand new days
Muchuu ni nareru koto ga taisetsu na mono ni natteyuku
Umarekawatta sono hi no kimi e
Happy birthday to you

Kazoekirenai hodo no deai to wakare no naka de
Kurikaesu mainichi ga kirenbi ni naru
Kitto soko ni wa itsumo sou egao ga afureteru

Hitotsu hitotsu omoi wo basudei keiki (birthday cake) ni tomosou
Hitofukishitara kiechau nante mada tarinainda your dreams
Suki ni nareru koto kara shippai wo osorezuniyukou
Arukihajimeta sono hi no kimi e
Happy birthday to you