Well, MK8 was released 1 day earlier in Japan (on a Thursday.) I could see a simultaneous release or one within a week again though. After all, this is THE WII U GAME for November/December 2014 worldwide. Not like NOA and NOE have anything else to translate.
Europe may have more people, but Japan alone has bought more Wii U's than that entire continent. It's a growing market but it's still smaller than Japan for Nintendo, especially if you look outside France, Germany, and to a lesser extent places like the UK, Italy, and Spain.
Who are you irked with though? I'm curious to hear your thoughts, I don't know very much about Japan and don't pretend to (market numbers aside.) The Best Buy demos were something NoA was behind for both USA and Canada.
NoJ decided not to do the E3 demos, not even in Akihabara shops. It's not a slight against their own countrymen, it's the realities of changing market conditions. Depressingly, dedicated gaming sales are falling off a cliff in Japan as I noted in
this post.
On a side note, it is an American trade show, maybe TGS will mean Smash U demos in Japan.
As for the release date, I think you're right but not by as much as Brawl, which was more than a month. More like Melee's less than 2 week difference as this will also be a late fall title. I suspect it'll be released between 1 week and 1 day earlier in Japan than in the west like MK8. NOA and NOE have nothing else huge to translate and publish and it's looking like
the major Wii U game for November/December 2014 though.