I just checked the Oricon ranking, and Ayu has once again taken the Number 1 spot for the daily charts. The weekly chart still isn't up, but the daily is as follows:

1) Ayumi Hamasaki - "Rainbow"
2) Kick the Can Crew - "Magic Number"
3) B'z - "The Ballads~ Love & B'z~"
4) Do As Infinity - "True Song"
5) Kinki Kids - "F Album"

Sometimes they're slow with updating, so I wouldn't be surprised if Ayu had been at the top this whole time!