To nobody's surprise, New Super Mario Bros. Wii topped the Japanese sales charts for the week that ended December 6, selling 953,000 amidst a chart featuring numerous sales debuts.
That figure is an all-time first-week Wii sales record for the nation, beating Nintendo's own previous high point of 816,000 for Super Smash Bros. Brawl.
Along with Mario's latest outing, five other games made their sales debuts on the top 10 this week. The top four slots were all occupied by newcomers, knocking last week's reigning Professor Layton and the Flute of Malevolent Destiny down to number 5; its lifetime sales have nearly reached 400,000. Sega, Namco Bandai, and Koei took slots 2 through 4.
The combined Nintendo DS juggernaut of Pokemon HeartGold and SoulSilver fell all the way from number 3 to number 8 this week, bringing its lifetime sales to 3.15 million.
Perhaps surprising is the appearance of Ubisoft's Assassin's Creed II, the only non-Japanese-developed game to appear in the top 30. It sneaked in at number 10 with 49,000 sales.
Below are the Japanese sales charts for the week ended November 29, 2009, according to tracking firm Media Create:
| LW | TW | Title | Publisher | Platform | Weekly Sales |
| NEW | 1 | New Super Mario Bros. Wii | Nintendo | Wii | 953,000 |
| NEW | 2 | Phantasy Star Portable 2 | Sega | PSP | 287,000 |
| NEW | 3 | Mobile Suit Gundam: Gundam vs. Gundam Next Plus | Namco Bandai | PSP | 223,000 |
| NEW | 4 | Sengoku Musou 3 | Koei | Wii | 121,000 |
| 1 | 5 | Professor Layton and the Flute of Malevolent Destiny | Level 5 | NDS | 85,000 |
| 2 | 6 | Tomodachi Collection | Nintendo | NDS | 75,000 |
| NEW | 7 | PokePark Wii: Pikachu no Daibouken | Pokemon Co. | Wii | 64,000 |
| 3 | 8 | Pokemon HeartGold/SoulSilver | Pokemon Co. | NDS | 63,000 |
| 4 | 9 | Wii Fit Plus | Nintendo | Wii | 52,000 |
| NEW | 10 | Assassin's Creed II | Ubisoft | PS3 | 49,000 |