First day sales in Japan

[PSP] Dissidia Final Fantasy (Square Enix) – 350k
[PS3] Gundam Musou 2 (Bandai Namco) – 106k
[PS2] Gundam Musou 2 (Bandai Namco) – 50k
[360] Gundam Musou 2 (Bandai Namco) – 14k
[NDS] Tales of Hearts: Anime Movie Edition (Bandai Namco) – 107k
[NDS] Tales of Hearts: CG Movie Edition (Bandai Namco) – 14k
[PS2] Fate/Unlimited Codes SP-Box (Capcom) – 32k
[PS2] Fate/Unlimited Codes (Capcom) – 19k
[NDS] Gensou Suikoden Tierkreis (Konami) – 40k
[360] Fable II (Microsoft) – 30k
[NDS] Ragnarok Online DS (GungHo) – 28k
[NDS] Momotarou Dentetsu: 20th Anniversary (Hudson) – 28k
[WII] Karaoke Joysound Wii (Hudson) – 24k

Source 1, Source 2