Welcome!
This is the un-official website for THE D4's fan (especially for Japanese).
Almost contents of this site are written in Japanese.
But I think you may be able to refer to DISCOGRAPHY and LINK. (These pages are written by mixture of Japanese/English.)
Please feel free to link to this site.
Thank you!

webmaster : yumi [e-mail]
THE D4 PARTY : http://sound.jp/thed4/