Those sales of Ayu's GUILTY are better than I expected actually. :0 I thought it will sell less than Secret did on the first week, but it did much better, which is nice.

#2 is good position, but I too like to see Ayu on #1. But it's not a end of the world for me if she doesn't get it. It's still good album, one of my favourities, and I never really cared about Secret, but I like it. I like GUILTY more. :> And #3 isn't too bad, I'd say, because if she wasn't in top10, then you should ask "What the heck is going on?".
Ayu's still a big star in Japan and who knows if she someday has a single, that will sell over 400,000 copies? I mean, Utada Hikaru for example sold really horribly with her ULTRA BLUE album singles in 2005-2006, and then Flavor of Life was released and it sold over 600,000 copies (and it's still charting, I think), and Beautiful World/Kiss & Cry sold over 200,000 copies. I believe Ayu might do the same someday.

Besides, even if she doesn't, it doesn't matter. Ayu's still Queen of J-pop and always will be.
And about Koda Kumi, I think her singles last year sold much worse than the ones she released in 2006. But I'm surprised how long Black Cherry has been on charts (and I love it btw), that's amazing. :0 Utada Hikaru's ULTRA BLUE has been on charts for months, even after Ayu's (miss)understood stopped selling. :p
// And about that Flavor of Life single, I guess the reason why it sold so much was that it was the main theme of Hana Yori Dango 2. :3 Or something.