I'd like to think it's the start of something big with Nintendo. Japanese games have really gotten the shaft during the HD gen. The well made ones generally didn't sell what they should have, and in Japan with the Wii and PS3 market split, none of their HD games were able to find the sort of audience that they did during the PS2 era. I'm wondering if maybe Wii U will be Japan's sort of "second chance."
I question how many Japanese studios will be able to jump into next gen development (PS4/Xbox3) after the result of the last few years. Wii U would make a great home for the studios over there that were having a hard time. With U's powerful Japanese launch lineup, it already looks positioned to do extremely well over there out of the gate.
With Western devs likely transitioning to next gen, this is the perfect time for Nintendo to snatch up big Japanese exclusives, and hopefully the result is that many other devs will follow suit.
Then again, Nintendo has pulled powerful moves like this in the past and it didn't really get them anywhere, like when they basically had the Resident Evil series locked up on Gamecube for a few years. So who really knows.