Famitsu have reported the Wii's sales figures have risen from 46,674 units to 101,000 units over the week ending 6th December, boosted by the launch of Super Mario Bros. Wii in the homeland.
The notion that the Japanese only like small devices continues to be thwarted however by the DSi LL, with sales of over 62,000 in the same week, making up over half of the total 113,700 DS units combined.
As far as software goes, New Super Mario Bros. Wii dominated by selling just shy of a million copies in its first week, destroying sales of Phantasy Star Portable 2 on the PSP, which sold a respectable 287,000 copies.
It remains to be seen whether the Wii will continue to rise or whether this is just a spike in sales for the console. Either way, you can be assured that Iwata has a smile on his face, if only for this week!