"I believe" was Ayaka's debut single, released 2006

Aya sang it on a 2006 "Utawara" episode

Mus: Nishio Yoshihiko (西尾芳彦), Ayaka (絢香), Lyr: Ayaka

TV version:

Kanji

この胸の中に隠れてる 不安のうず
目の前にある 自分の進むべき
道はどれか

人に流されてた日々
そんな自分に「さよなら」

I believe myself 信じることで
全てが始まる気がするの
I believe myself あたたかい光は
まちがっちゃいない 歩いて行こう
I believe

偽りの中でウソの微笑(え)み浮かべて
生きる人を
幼き自分と重ねて見て
ため息つく

どんな色にも染まらない
「黒」になろうと誓った

I believe myself 信じることで
全てが始まる気がするの
I believe myself あたたかい光は
まちがっちゃいない 歩いて行こう
I believe

今 目に映る この広い空も
素直に生きる この気持ちも

I believe myself 信じることで
全てが始まる気がするの
I believe myself あたたかい光は
まちがっちゃいない 歩いて行こう
I believe
Myself
I believe myself

Romaji

Kono mune no naka ni kakureteru fuan no uzu
Me no mae ni aru jibun no susumu beki
Michi wa dore ka

Hito ni nagasareteta hibi
Sonna jibun ni "sayonara"

I believe myself shinjiru koto de
Subete ga hajimaru ki ga suru no
I believe myself atatakai hikari wa
Machigacchainai aruite yukou
I believe

Itsuwari no naka de uso no emi ukabete
Ikiru hito wo
Osanaki jibun to kasanete mite
Tameiki tsuku

Donna iro ni mo somaranai
"Kuro" ni narou to chikatta

I believe myself shinjiru koto de
Subete ga hajimaru ki ga suru no
I believe myself atatakai hikari wa
Machigacchainai aruite yukou
I believe

Ima me ni utsuru kono hiroi sora mo
Sunao ni ikiru kono kimochi mo

I believe myself shinjiru koto de
Subete ga hajimaru ki ga suru no
I believe myself atatakai hikari wa
Machigacchainai aruite yukou
I believe
Myself
I believe myself

Translation

In my heart I hide a vortex of anxiety
Which of the roads before me
Is the one I should take?

Those days when I got swept away by other people
I’ll say goodbye to that me

I believe myself, I feel like
Everything begins from believing
I believe myself, that warm light
Can’t be wrong, I’ll walk into it
I believe

Those people who put on fake smiles
Amid all the lies
They, along with the person I was when I was young
Make me sigh

I won’t be stained in any colour
I swore I’d be “black”

I believe myself, I feel like
Everything begins from believing
I believe myself, that warm light
Can’t be wrong, I’ll walk into it
I believe

The wide sky my eyes can see now
And the feeling of being true to myself

I believe myself, I feel like
Everything begins from believing
I believe myself, that warm light
Can’t be wrong, I’ll walk into it
I believe
Myself
I believe myself