From TEPCO's page dedicated to the Reactor 4 Spent Fuel Pool fuel removal operation:
Breakdown of transferred assemblies as of January 27, 2014:
Spent fuel: 198 assemblies/1,331 assemblies
Unirradiated (New) fuel: 22 assemblies/ 202 assemblies
Number of times of cask transportation: 10 times
So they have been removing used fuel assemblies except for the 22 new ones that they removed in the very first removal operation.