| 1/7/1999 | Eternal Memories | |
|
1. | Eternal Memories |
| 2. | FLY AWAY | |
| 3. | FLY AWAY (acappella) | |
| 4. | Eternal Memories (Instrumental) | |
| 8/9/1999 | TEENAGE UNIVERSE ~Chewing Gum Baby~ | |
|
1. | TEENAGE UNIVERSE ~Chewing Gum Baby~ |
| 2. | TEENAGE UNIVERSE ~Chewing Gum Baby~ (Remix) | |
| 3. | TEENAGE UNIVERSE ~Chewing Gum Baby~ (Instrumental of Remix) | |
| 3/11/1999 | Komichi no Hana | |
|
1. | Komichi no Hana (こみちの花) |
| 2. | Komichi no Hana (Instrumental) (こみちの花) | |
| 3. | Good Morning Sue | |
| 23/3/2000 | Shadows of Desire | |
|
1. | Shadows of Desire |
| 2. | Fly Away (Original TV Version) | |
| 3. | Shadows of Desire (Instrumental) | |
| 15/2/2001 | LOST CHILD | |
|
1. | LOST CHILD (Original Version) |
| 2. | LOST CHILD (Orchestra Version) | |
| 3. | LOST CHILD (Radio Edit) | |
| 4. | LOST CHILD (Instrumental) | |
| 9/5/2001 | Girl's Night | |
|
1. | Girl's Night |
| 2. | Girl's Night (Layer 7 Remix) | |
| 3. | Make Me Whole | |
| 4/7/2001 | Ex-Boyfriend | |
|
1. | Ex-Boyfriend feat. VERBAL (m-flo) |
| 2. | Ex-Boyfriend (AKIRA'S googolplex REMIX) feat. VERBAL (m-flo) | |
| 3. | Time After Time | |
| 28/11/2001 | think of U | |
Buy IT! |
1. | think of U |
| 2. | Attitude | |
| 3. | think of U (remix) | |
| 7/8/2002 | hard to say | |
Buy IT! |
1. | hard to say |
| 2. | think of U (KZ Future Disco Mix) | |
| 3. | hard to say (Instrumental) | |
| 23/10/2002 | Girl U Love | |
Buy IT! |
1. | Girl U Love |
| 2. | hard to say (TinyVoice,Production Remix) | |
| 3. | hard to say (SPC FINEST Remix) | |
| 22/1/2003 | Boyfriend -part II- | |
Buy IT! |
1. | Boyfriend -part II- |
| 2. | Boyfriend (MAESTRO-T Remix) | |
| 3. | Boyfriend (Nice & Smooth Version) | |
| 18/6/2003 | I LIKE IT | |
Buy IT! |
1. | I LIKE IT |
| 2. | OVER THE RAINBOW | |
| 3. | REEEPLAY! (by DJ HASEBE) | |
| 22/10/2003 | Candy | |
Buy IT! |
1. | Candy |
| 2. | hard to say (acoustic version) | |
| 3. | Eternal Memories (acoustic version) | |
| 27/11/2003 | Can't be Stopped | |
Buy IT! |
1. | Can't be Stopped |
| 2. | Boyfriend (acoustic version) | |
| 3. | Can't be Stopped ~TIL THE SUN COMES UP~ | |
| 12/5/2004 | Motherland | |
Buy IT! |
1. | Motherland |
| 2. | AS IT BEGAN | |
| 3. | Motherland (Instrumental) | |
| 17/11/2004 | Bye My Darling! | |
Buy IT! |
1. | Bye My Darling! |
| 2. | flowers | |
| 3. | Mirai no Chizu (未来の地図) | |
| 26/1/2005 | Kiss | |
Buy IT! |
1. | Kiss |
| 2. | got to move on | |
| 3. | Sweet friends | |
| 4. | Kiss (Instrumental) | |
| 18/5/2005 | Koi ni Ochitara | |
Buy IT! |
1. | Koi ni Ochitara (恋におちたら) |
| 2. | LOVE it TAKE it | |
| 3. | BET YOU DON'T KNOW (English Version) | |
| 4. | Koi ni Ochitara (恋におちたら) (Instrumental) | |
| 5/10/2005 | Two As One | |
Buy IT! |
1. | Two As One (Crystal Kay X CHEMISTRY) |
| 2. | Namida ga Afurete mo (涙があふれても) | |
| 3. | MY EVERYTHING (English Version) | |
| 4. | Two As One (Instrumental) (Crystal Kay X CHEMISTRY) | |
| 8/2/2006 | Kirakuni / Together | |
Buy IT! |
1. | Kirakuni |
| 2. | Together | |
| 3. | Koi ni Ochitara (Kut Remix) (恋におちたら) | |
| 4. | Kirakuni (Instrumental) | |
| 17/1/2007 | Kitto Eien ni (きっと永遠に) | |
Buy IT! |
1. | Kitto Eien ni (きっと永遠に) |
| 2. | As One | |
| 3. | Kitto Eien ni (きっと永遠に) (STUDIO APARTMENT REMIX) | |
| 4. | As One (REMIX) | |
| 5. | Kitto Eien ni (きっと永遠に) (Instrumental) | |
| 28/2/2007 | Konna ni Chikaku de... (こんなに近くで...) | |
Buy IT! |
1. | Konna ni Chikaku de... (こんなに近くで...) |
| 2. | FEEL | |
| 3. | Konna ni Chikaku de... (こんなに近くで...) (KZ Future Disko Remix) | |
| 4. | FEEL (Singo.S Remix) | |
| 5. | Konna ni Chikaku de... (こんなに近くで...) (Instrumental) | |
| 16/5/2007 | Anata no Soba de (あなたのそばで) | |
Buy IT! |
1. | Anata no Soba de (あなたのそばで) |
| 11/6/2008 | Namida no Saki ni (涙のさきに ) | |
Buy IT! |
1. | Namida no Saki ni (涙のさきに) |
| 2. | Girl Move On | |
| 3. | Dream World (SOIDOG MIX) | |
| 4. | Namida no Saki ni (涙のさきに) (SOIDOG MIX) | |
| 5. | Namida no Saki ni (涙のさきに) (Instrumental) | |
| 16/7/2008 | ONE (Normal Edition) | |
Buy IT! |
1. | ONE |
| 2. | Suki (すき) | |
| 3. | ONE (Cornelius Remix) | |
| 4. | ONE (Dexpistols Remix) | |
| 5. | ONE (Instrumental) | |
| 16/7/2008 | ONE (Pokémon Edition) | |
Buy IT! |
1. | ONE |
| 2. | ONE (Pokémon Version) | |
| 3. | ONE (Instrumental) | |
| 12/8/2009 | After Love -First Boyfriend- feat. KANAME (CHEMISTRY) / Girlfriend feat. BoA | |
|
1. | After Love -First Boyfriend- feat. KANAME (CHEMISTRY) |
| 2. | Girlfriend feat. BoA | |
| 3. | Deaeta Kiseki (出会えた奇跡) | |
| 4. | After Love -First Boyfriend- feat. KANAME (CHEMISTRY) (Instrumental) | |
| 5. | Girlfriend feat. BoA (Instrumental) | |