I lifted this from an article on n4g listed as Japan top 10 through 4/29. It doesn't have numbers and if this is a repeat of another post, please lock and/or delete.
1. Final Fantasy XII: Revenant Wings (DS)
2. Super Paper Mario (Wii)
3. Momotarou Dentetsu DS: Tokyo & Japan (DS)
4. Wii Sports (Wii)
5. Big Brain Academy: Wii Degree (Wii)
6. Gyakuten Saiban 4 (DS)
7. One Piece Unlimited Adventure (Wii)
8. Panel de Pon DS (DS)
9. Mario vs. Donkey Kong 2: March of the Minis (DS)
10. Wii Play (Wii)