Thanks to MTRLB at Ayunite for finding this info. Ayu's album RAINBOW actually made it onto the World-wide Album Chart.
http://www.ayumi-sg.com/forum/viewtopic.php?t=3785
Week 1 - 29th Position
<a href="http://www.mediatraffic.de/albums-week01-2003.htm">
http://www.mediatraffic.de/albums-week01-2003.htm</a>
Week 2 - 33rd Position
<a href="http://www.mediatraffic.de/albums-week02-2003.htm">
http://www.mediatraffic.de/albums-week02-2003.htm</a>
Week 3 - 35th Position
<a href="http://www.mediatraffic.de/albums-week03-2003.htm">
http://www.mediatraffic.de/albums-week03-2003.htm</a>
Week 4 - Didn't make it in the top 40.
Now remember that these charts count albums from all over the world. It's pretty impressive that Ayu made it onto these charts! Good for her!