Japan sales
717,185 - Greatest Hits : My Prerogative #1 60wks 2004/11/04
406,716 - In The Zone #3 49wks 2003/11/15
279,740 - ...Baby One More Time #9 21wks 1999/02/24
242,400 - Oops...! I Did It Again #4 14wks 2000/05/03
191,130 - Britney #4 18wks 2001/10/31
117,911 - Circus #5 28wks 2008/12/03
89,630 - Britney: Secret Diary #13 11wks 2002/06/05
79,086 - Blackout #4 14wks 2007/11/14
75,893 - Complete Hit Singles #8 17wks 2009/11/25
57,521 - Femme Fatale #8 26wks 2011/04/06
26,219 - B in the mix ~the remixes vol 1~ #25 8wks 2005/11/30
3,751 - ...Baby One More Time/Oops...! I Did It Again #274 3wks 2002/11/07
1,971 - B in the mix ~the remixes vol 2~ #83 2wks 2011/11/30
She was so big there back in 2003-2004
She better get her ass over there and promote next era, Japan is a huge market.