Rōmaji
Wakatten'da yo
Hoka no daredemo nakute
Kono sora ippai no niji o kakete [bad word] yo

Itsumade tatte mo todo kanai yo
Ato nankai mo kuri kaesu nichijou
 [bad word] no wa itsuka jibun de egaita mirai
Mata dareka no seini [bad word] 
Wakatten'da yo
Kono mama ja damena koto
Kono mede [bad word]  [bad word] no jibun” wa mou shinjite ii'n desuka?

Wakatten'da yo
Ika nakucha ikenai koto
Niji no mukou de [bad word] mou hitotsu no mirai e

Wakatten'da yo
Wakatten'da yo

Kanji
解ってんだよ
他の誰でもなくて
この空いっぱいの虹をかけてみせるよ

何時まで経っても届かないよ
あと何回も繰り返す日常

追いかけてるのはいつか自分で描いた未来
また誰かの所為にしてた

解ってんだよ
其の侭じゃ駄目な事
この目で見出した“明日の自分”はもうしんじていいんですか？

解ってんよ
行かなくちゃいけない事
虹の向こうで待ってるもう一つの未来へ

解ってんだよ
解ってんだよ

English
I know very well
I understand better than anyone else
I'll show you the end of the rainbow.

When will I be able to reach it?
How many times will I have to repeat it?

I'll keep chasing my picture of the future.
Again, I put the blame on someone else.

I know very well
All of this is useless
After seeing my eyes, can you still believe in your tomorrow?

I know very well
You didn't have to go
Beyond the rainbow, a single future is waiting

I know very well
I know very well