The PS4 has an AWESOME Line-up this year while for the Wii U.... Not so much. But Who knows? We might get "Splatooned" again! 

This week:

Wii U : 7k , 3ds: 25k
PS4 : 33k , vita : 45k

Dragon Qustion Builders:
Vita : ~180k
PS4: ~140k
PS3: ~60k

Dragon Quest builders isnt even a mainline DQ game, but a minecraft like spin off for the series.
PS4 is getting ALOT of jrpgs in 2016. Going by my gut, I dont think the Wii U will have that many weeks ontop anymore.

Voted 2-4.

This year will be hard for Wii U to compete, since the PS4 is getting a divine numbers of excellent games, while the Wii U has 5 or 6 releases, and not all are godlike so....

None.

Edit: I just now realized that this was Japan-only. Still, I doubt the Wii U will have much success against the PS4.

3-4 if the NX doesn't launch this year, 1 if it does (Zelda U launch).

Well Wii U already has it biggest franchises in Japan, and everyone expecting new hardware, so this year doesnt look good at all for Wii U.

With a wiiu priceCUT in march, maybe. without pricecut: never/none, i think.
because: IGN: more than 200 games this year are coming for PS4 and very big jrpgs!
(Persona 5, Final Fantasy 15, Star Ocean 5, Naruto UNS5, One Piece, Street Fighter 5, DQH 2, Attack on Titan, Dark Souls 3, Uncharted 4, PSVR ect)

It could be none but I'll vote 2-4. If the ps4 got a price cut it could go to insanely low numbers the week before and the Wii U could get a cut (unlikely) or a game like Zelda could give it a win.

It's going to be a long year for wii u vs the ps4 because it's looking unstoppable on the home console front.

around 10 probably. Depends on when exactly upcoming PS4 and Wii U games launch. And Christmas and Zelda could put the Wii U above PS4 for some weeks.

Is there anything other than Zelda that could do it?