Thanks to ioripresent for this link.
RAINBOW has reached the number one position for daily CD sales. Here is the link:
http://www.oricon.co.jp/ranking/daily_album.html
I'm really not too surprised at this. Ayu is pretty used to the #1 position by now! hehe
And I'm sure that once the week is over, she'll be at the top of the weekly sales as well!