[blimp]

no you won't need anything extra, if that is what you mean.
just plug it in to a power source and to the antenna plug. this will most likely give you 2 NHL channels, 4 private channels covering the whole of japan, one kyoto-channel and perhaps some even more local channel, a tv-shop channel and perhaps 2 BS channels.

you are however supposed to pay the NHK fee, NHK受信料, but that is not needed to get the TV to work.

disclaimer
if you live in a very old building or rather a dorm, the land-lord might have the possibility to disable the antenna plug, if you don't pay the NHK fee.