Japan got EPAWWS.
About KFX, my understanding until now is IFX and KFX will use the same (hanwha) system: avionics, IRST, etc. The only differences are just a minor thing like IFX got bigger drop tank and drag chute.
But some people out there say we have to develop or buy a lot of system by...
From old news, they said IFX will use drogue and probe for air refueling. But now we aiming for MRTT, will they change to Boom just like Boramae?
It will simplify our development