Alright, had to update the February release list, missed the XB1 version of some games.
PS4 is the system getting the most releases on February with 6, WiiU is the one getting the least, as its not getting any.
Here's a more detailed list, all the January software sales data released by Famitsu.
The black box means that that game wasn't available that week, the "-" means there was no numbers for that game released that week.
Titles per platform
3DS - 25
PSV - 11
PS3 - 9
NWU - 6
PS4 - 4
Total known software sales for the month of January
3DS ~1.4m
PS3 ~473k
NWU ~266k
PSV ~111K
PS4 ~86k
Total known software sales, only games released in January
PS3 ~387k (3 titles)
3DS ~180K (6 titles)
PSV ~69k (9 titles)
PS4 ~51k (3 titles)
NWU ~49k (2 titles)