New Super Mario Bros Wii has sold 936,734 units during its first week on sale in Japan, making it the fastest selling week one Wii title in the region to date.
The Famitsu sales figures put the title ahead of previous week one high sellers Super Smash Bros Brawl (816,198), Mario Kart Wii (608,147) and Monster Hunter 3 (582,548).
According to Andriasang, the game sold over 422,000 copies in its first day alone.
The game has performed well in the UK charts too, entering at number three after Assassin's Creed 2 and Call of Duty: Modern Warfare 2.
Analyst Colin Sebastian noted last month the its sales had got "off to a good start after three days at retail", although added it wasn't yet apparent if the title had driven incremental hardware sales.