If (ending)

If, performed by, is the ending theme of Naruto Shippūden 4: The Lost Tower.

Rōmaji
Moshi ano hi no ame ga Yande itanara Kitto sure tokutte itadakeka mo Itsumo toori no jikan ni Bus ga kitetanara Kimi to wa deau koto ga nakattanda ne

Moshimo sukoshi demo Ano shunkan ga zuretetara Futari wa tokutta unmei wo tadotte shimatteta

Kimi to onaji mirai wo Zutto issho ni mite itai Onaji hoshi wo onaji bashou de Mitsumete iyou yo Kimi no egaku mirai ni Watashi wa iru no kana Onaji sora wo onaji omoi de Miagete itai yo

Kuchiguse ya shigusa mo Yoku nite kita futari Maru de zutto mukashi kara shitteru mitai da ne Douji ni meeru shitari Onaji koto omottari Akai ito de hiki yoserareteru no kamo

Guuzen wa saisho kara Mou kimatteta mitai ni Kasanatta futari wa unmei tte shinjite iru yo

Kimi no egaku mirai ni Watashi wa iru no kana Onaji sora wo onaji omoi de Miagete itai yo

Kimi to onaji mirai wo Zutto issho ni mite itai Onaji hoshi wo onaji bashou de Mitsumete iyou yo Kimi no egaku mirai ni Watashi wa iru no kana Onaji sora wo onaji omoi de Miagete itai yo

Tatoeba namida no hi mo Hare no hi mo futari de Onaji michi wo itsumade mo Te wo tsunaide arukemasu you ni

Kimi to onaji mirai wo Zutto issho ni mite itai Onaji hoshi wo onaji bashou de Mitsumete iyou yo

Kimi no egaku mirai ni Watashi wa iru no kana Onaji sora wo onaji omoi de Miagete itai yo

Rōmaji (Ending Version)
Moshi ano hi no ame ga Yande itanara Kitto sure tokutte itadakeka mo Guuzen wa saisho kara

Mou kimatteta mitai ni Kasanatta futari wa unmei tte shinjite iru yo Kimi no egaku mirai ni

Watashi wa iru no kana Onaji sora wo onaji omoi de Miagete itai yo

Kimi to onaji mirai wo Zutto issho ni mite itai Onaji hoshi wo onaji bashou de

Mitsumete iyou yo

Kimi no egaku mirai ni Watashi wa iru no kana Onaji sora wo onaji omoi de Miagete itai yo

English
If the rain had stopped That day I might surely have just walked past you If the bus had arrived At its usual time I wouldn't have met you

If that instant

Had been slightly different

We would have walked on separate paths of fate

I always want to watch

The same future together with you

Let's look at the same stars

At the same spot

I wonder if I am present

In the future you imagine for yourself

I want to look up to

The same sky with the same feelings

Our ways of talking and acting

Are really similar

It's like if we have always known each other

Mailing each other at the same time

Thinking about the same things

We might have been bound together by a red thread

We fit so well together, like if

It was decided by chance right from the start

I believe we are fated to be together

I wonder if I am present

In the future you imagine for yourself

I want to look up to

The same sky with the same feelings

* repeat

So we may always walk

On the same path, hand in hand

Even on days filled with tears

And on sunny days

Trivia

 * This theme was also used in a movie version ending of Naruto: Shippūden anime.