Here are lyrics for the opening, closing, and movie songs for Inuyasha! ^_^ You can find them in romaji format and their English translations. All lyrics are taken from AnimeLyrics.com with gratitude! Drop by the site; they have loads of anime lyrics...

Change the World - 1st opening - sung by V6

My Will - 1st ending - sung by dream

I Am - 2nd opening - sung by Hitomi

Fukai Mori (Deep Forest) - 2nd ending - sung by Do As Infinity

Owarinai Yume (Neverending Dream) - 3rd opening - sung by Aikawa Nanase

Dearest - 3rd ending - sung by Hamasaki Ayumi

Grip! - 4th opening - sung by Every Little Thing

Every Heart - 4th ending - sung by BoA

Shinjitsu no Uta (Song of Truth) - 5th ending - sung by Do As Infinity

No More Words - 1st movie theme - sung by Hamasaki Ayumi