That's the best opening-week sales performance in the country in the Wii's history, beating Super Smash Bros. Brawl's previous record by over 100,000 units. That game sold 820,000 copies in a week back in January. It's more than three times the sales of last week's Japanese chart-topper, the latest Professor Layton game for DS.
New Super Mario Bros. Wii has made a less spectacular showing in the UK charts, placing behind Modern Warfare 2 and Assassin's Creed 2 in its first two weeks on sale. We don't yet know how it's done in the US, however - NPD figures for November are expected this week.