That's surprising! I mean her sales haven't been as what they have been in the past and yet she still comes out tops? Must be the A Nation goods and her tours!
Oh, and her having more influence in Asia.
I think although Ku-chan is tour active this year, I think Ayu fans are still much more crazy than Ku fans! I'm still back to the same argument, I believe Ku is the "top female artiste of the moment" but then Ayu has a more established base. Maybe that's the reason Ayu still earns more.