| Crystal Kay Albums |
| album | date | label |
| Motherland | 12 May 2004 | Epic Records Japan |
| Color Change! | 12 May 2004 | avex group holdings |
| Call me Miss... | 12 May 2004 | avex group holdings |
| Crystal Style | 2 Mar 2005 | avex group holdings |
| CK5 | 30 Jun 2004 | avex group holdings |
| 4REAL | 27 Nov 2003 | Epic Records Japan |
| almost seventeen | 23 Oct 2002 | Epic Records Japan |
| ONE | 16 Jul 2008 | avex group holdings |
| Shining | 28 Nov 2007 | avex m/r group |
| NATURAL | 25 Dec 2003 | Sony/Epic |
| 637-always And Forever- | 25 Dec 2003 | |
| 鋼の錬金術師 COMPLETE BEST | 11 Jun 2008 | avex group holdings |
| Call Me Miss | 11 Jun 2008 | avex group holdings |
| 4 REAL | 27 Nov 2003 | avex group holdings |
| Kiss | 26 Jan 2005 | avex group holdings |
| C.L.L -Crystal Lover Light | 26 Jan 2005 | Epic Records Japan |
| Candy | 22 Oct 2003 | Epic Records Japan |
| Two As One | 26 Oct 2005 | Epic Records Japan |
| Kirakuni/Together | 26 Oct 2005 | Epic Records Japan |
| 637 Always and Forever | 22 Aug 2001 | Epic Records Japan |
| NATURAL - World Premire Album - | 22 Aug 2001 | Epic Records Japan |
| Eternal Memories | 1 Jul 1999 | Epic Records Japan |
| Kirakuni / Together | 8 Feb 2006 | Epic Records Japan |
| Can't be Stopped | 27 Nov 2003 | Epic Records Japan |
| Boyfriend -part II- | 22 Jan 2003 | Epic Records Japan |
| Bye My Darling! | 17 Nov 2004 | Epic Records Japan |
| Girl U Love | 23 Oct 2002 | Epic Records Japan |
| SMOOTH | 23 Oct 2002 | Epic Records Japan |
| hard to say | 7 Aug 2002 | Epic Records Japan |
| Ex-Boyfriend | 4 Jul 2001 | Epic Records Japan |
| think of U | 28 Nov 2001 | Epic Records Japan |
| Konna ni Chikaku de | 28 Nov 2001 | |
| I LIKE IT | 18 Jun 2003 | Sony/Epic |
| Girl's Night | 9 May 2001 | Avex Trax |
| C.L.L. - Crystal Lover Light | 23 Mar 2000 | Avex Trax |
| Shadows of Desire | 23 Mar 2000 | Avex Trax |
| Boyfriend -part II | 23 Mar 2000 | |
| 637－always and forever－ | 23 Mar 2000 | Epic Records Japan |
| TEENAGE UNIVERSE - Chewing Gum Baby | 8 Sep 1999 | Epic Records Japan |
| Diva | 3 Nov 1999 | |
| I LIKE IT | 18 Jun 2003 | |
| CK5(初回生産限定盤)(DVD付) | 18 Jun 2003 | |
| Candy | 18 Jun 2003 | |
| Shadows of Desire/Fly Away | 18 Jun 2003 | |
| Boyfriend-partII- | 18 Jun 2003 | |
| Can’t Be Stopped | 18 Jun 2003 | |
| Call me Miss...(初回生産限定盤)(DVD付) | 18 Jun 2003 | |
| 鋼の錬金術師 COMPLETE | 18 Jun 2003 | |
| Crystal Style (初回限定盤)(DVD付) | 18 Jun 2003 | |
