Romaji:

onaji egao [bad word] sonna bokura mo ikunen wo kasanesugite
surechigau keshiki wo
ukeirerarezu ni [bad word] 
muda na puraido sutesari
kono sekai ni yasashisa wo

I Gotta Say
yuuki wo misetsukete mo tsuyogatte mo
hitori dewa ikirarenai
ano hi no yakusoku nara
kokoro no [bad word] ni [bad word] yo ima demo

wakarete mata deai
arata na michi ni hikari mitsuke [bad word] umarete kara zutto
kurikaesu koto de tsunagatteku

itsunoma ni kimi to boku mo
sorezore mirai wo te ni [bad word] 
I Gotta Say
tooku hanareteite mo aenakute mo
tsuyoi kizuna wa [bad word] kara
yume ga kanaimasu youni
kokoro no soko kara [bad word] yo
We're friends forever
mata au koto wo chikai
yubikiri [bad word] bokura wa [bad word] ne
mienai ikisaki eto
mayoinagara demo [bad word] yo
itsudemo

kawariyuku kisetsu to
toki no naka
natsukashii melodies
otona ni natte mo
iroase wa shinai yo
bokutachi no precious memories

I Gotta Say
yuuki wo misetsukete mo tsuyogatte mo
hitori dewa ikirarenai
ano hi no yakusoku nara
kokoro no [bad word] ni [bad word] yo

As life goes on
wasurecha ikenai kara Yeah
Don't let it go
kono hiroi daichi to nakama-tachi no koto

English translation:

While we wore the same smiles,
We passed through the years together.
The sceneries kept changing,
And we [bad word] to accept it.

I throw away my useless pride.
May [bad word] to this world.

I Gotta Say
Even if I show off my bravery and my strength,
I can't survive alone.
Our promise from that day,
It remains firmly in my heart, even now.

New [bad word] after each farewell.
I find light down a new path, and move on.
Since the day I was born,
That has been the way my life is molded.

Before we realized it,
We have both found our own futures.

I Gotta Say
Even if you are far away where I can't meet you,
There's a resilient bond between us.
"May my [bad word] [bad word] "
I am praying from the bottom of my heart.
We're friends forever.
We pledged to meet again someday,
Crossed our little fingers,
And set out that day,
For unseen destinations,
And though we may be lost,
We are making progress,
Always.

Through the changing seasons,
And this fleeting moment,
I listen to these nostalgic melodies.
Even when I [bad word] an adult,
Some things won't fade,
Like our precious memories.

I Gotta Say
Even if I show off my bravery and my strength,
I can't survive alone.
Our promise from that day,
It remains firmly in my heart.

As life goes on...
I mustn't forget, yeah.
Don't let it go...
I remember this vast land and my friends