This list was put together a few years back but I added all the missing albums and excluded male artists/groups.



1. Hikaru Utada - Distance: 3,000,000



2. Ayumi Hamasaki - A Best: 2,880,000



3. Britney Spears - Oops!...I Did It Again: 2,400,000



4. Hikaru Utada - Deep River: 2,400,000



5. Hikaru Utada - First Love: 2,030,000



6. Norah Jones - Feels Like Home: 1,930,000



7. Namie Amuro - Sweet 19 Blues: 1,921,000



8. Lady Gaga - Born This Way: 1,921,000



9. Ayumi Hamasaki - I Am...: 1,751,000



10. Ayumi Hamasaki - Duty: 1,682,000



11. Taylor Swift - 1989: 1,681,000



12. Britney Spears - Britney: 1,625,000



13. Taylor Swift - Red: 1,459,000



14. Mariah Carey - #1's: 1,430,000



15. Hikaru Utada - Single Collection: 1,403,000



16. Susan Boyle - I Dreamed A Dream: 1,387,000



17. Madonna - Confessions On A Dance Floor: 1,377,000



18. Misia - Love Is The Message: 1,349,000



19. Tomomi Kahala - Love Brace: 1,313,000



20. Ayumi Hamasaki - LOVEppears: 1,200.000



21. Taylor Swift - Speak Now: 1,149,000



22. Britney Spears - In The Zone: 1,110,000



23. Britney Spears - Greatest Hits: My Prerogative: 1,103,000



24. Ami Suzuki - SA: 1.058,000



25. Ayumi Hamasaki - Rainbow: 1,016,000


Sources: Mediatraffic, Oricon, UKMix, etc

Japan's power is undeniable

Distance - 2001 (3 million)
A Best - 2001 (2.8 million)
Deep River - 2002 (2.4 million)
First Love - 1999 (2 million)
Sweet 19 Blues - 1996 (1.9 million)
I Am - 2002 (1.75 million)
Duty - 2000 (1.7 million)
Single Collection - 2004 (1.4 million)
Love Is The Message - 2000 (1.35 million)
Love Brace - 1996 (1.3 million)
SA - 1999 (1.05 million)
Rainbow - 2002 (1 million)
Back Beats #1 - 1995 (1 million)



Mariah is #3 for the 1990s with over 1.4 million. Still very impressive.

Mariah scalping in the 90's with a greatest hits album