1. Ai Otsuka
2. aiko
3. Anam & Maki
4. Angela Aki
5. Arashi
6. ayaka
7. Base Ball Bear
8. BoA
9. BONNIE PINK
10. chatmonchy
11. Chihiro Onitsuka
12. Crystal Kay
13. FUNKY MONKEY BABYS
14. GReeeeN
15. KAT-TUN
16. KinKi Kids
17. Leah Dizon
18. Maaya Sakamoto
19. m-flo
20. mihimaru GT
21. Mika Nakashima
22. Morning Musume
23. Nakagawa Shoko
24. Perfume
25. Porno Graffitti
26. PUFFY
27. SEAMO
28. TOKIO
29. Tokyo Jihen
30. YUI
31. YUKI
Ranging from January 5 to December 10. Basically I only knew about Ayumi, Hikki, Kumizon, Namie and MAI before 2007.
