[tenshi no hane]

how beautiful you are (Japanese lyrics):

Spoiler:

今日も一日ありがとう
その笑顔に助けられた

今日も一日ありがとう
そうしてそこに居てくれて

あなたがもらい泣きとかするから
それを見てまた泣いて

繋いだ手から伝わる思い
永遠でありますように

You don't know You don't know
how beautiful you are
あなたが想うよりも

You don't know You don't know
how beautiful you are
あなたはずっと美しいから

今日も一日ありがとう
その涙に教えられた

今日も一日ありがとう
乗り越えてきてくれて

あなたがただ前に進み続けるから
それを見てまた励まされて

どうか優しくて穏やかな風が
包んでくれますように

You don't know You don't know
how beautiful you are
あなたが思うよりも

You don't know You don't know
how beautiful you are
あなたは優しく強くなった

You don't know You don't know
how beautiful you are

You don't know You don't know
how beautiful you are
あなたはずっと美しいから

(source + some edits by me)

The lyrics aren't official, but look correct to me.

EDIT: romaji~

Spoiler:

kyou mo ichinichi arigatou
sono egao ni tasukerareta

kyou mo ichinichi arigatou
soushite soko ni ite kurete

anata ga morainaki toka suru kara
sore wo mite mata naite

tsunaida te kara tsutawaru omoi
eien de arimasu you ni

you don't know you don't know
how beautiful you are
anata ga omou yori mo

you don't know you don't know
how beautiful you are
anata wa zutto utsukushii kara

kyou mo ichinichi arigatou
sono namida ni oshierareta

kyou mo ichinichi arigatou
norikoete kite kurete

anata ga tada mae ni susumi tsuzukeru kara
sore wo mite mata hagemasarete

douka yasashikute odayaka na kaze ga
tsutsunde kuremasu you ni

you don't know you don't know
how beautiful you are
anata ga omou yori mo

you don't know you don't know
how beautiful you are
anata wa yasashiku tsuyoku natta

you don't know you don't know
how beautiful you are

you don't know you don't know
how beautiful you are
anata wa zutto utsukushii kara