Top 20
1. Hoshino Gen
2. Mr. Children
3. back number
4. Namie Amuro
5. RADWIMPS
6. Kana Nishino
7. Yonezu Kenshi
8. Utada Hikaru
9. WANIMA
10. BUMP OF CHICKEN
11. ONE OK ROCK
12. Nogizaka46
13. Yuzu
14. Sandaime J Soul Brothers from EXILE TRIBE
15. Keyakizaka46
16. AKB48
17. AAA
18. Ken Hirai
19. SMAP
20. Mai Kuraki
Pretty good position for an artist that have not released anything this year.
Source