Switch passed PSP and 3DS numbers in same time period, that quite impressive especially if we know that still is heavily supply constrained.

http://www.neogaf.com/forum/showpost.php?p=246260674&postcount=110

3DS and DS sold like beasts in Japan. Will be tough to beat, the rest are push-overs.

It barely caught them thanks to Splatoon. It'll be back below their graphs soon enough.

I'm guessing you haven't been paying very much attention to Japanese sales, then?

With increased stock we should see a steep rise

Not really, only next two weeks will be problem for Switch, after that if Switch continues to have shipments like this it easily stay above 3DS.

2mil in 1st year here we come!

Why stop there? 3 million is easily within reach at its current pace.

Need to pass 2mil first though xD Then we can aim for 3mil! 

Actually, at the end of 52 weeks it's possible that the Switch will be ahead of the Wii. And if we're talking lifetime, it's guaranteed that the Switch will pass the Wii, since the Wii only sold 12.77 million in Japan.