Now that I've seen vids the Ness is also a top 4 contender.
If Nangoku knows that in (U):
1. recovering high with Ness isn't really as much of an option anymore (especially without platforms (via Hyrule))
2. An opponent can DI a lot more effectively out of the Ness combos
3. Utilt has more knockback, and Uair has less knockback meaning a change in recipe for juggles.
I mean I hope these Japanese players have a copy of Smash US.
Like there isn't a near parity like Brawl where (J) players can swoop in and destroy, the differences between the regions are substantial and take getting used to.
I say they will perform well if they prepare well because just by looking at some vids it appears as if the competition in Japan is pretty stiff.
I expect Isai (If he plays to win) and Boom to be safe, but no one else, not even Jaime.