There’s no “basically” to it, there is a THAAD radar set in Japan. From what I hear the deployment was supposed to be hush-hush, but they announced in the base paper that the FBX-T radar system had arrived. Oops. Now you hear about the radar having a different purpose, but then the DoD goes and gives both the FBX-T and the THAAD radar set the name AN/TPY-2, basically telling everyone that they are one and the same. The idea that we’d need to base an ABM (FBX-T has been referred to as a forward-based anti-ICBM radar) radar set in Japan is asinine anyway. My guess is that there are THAAD components around there somewhere, maybe even being quietly evaluated by the Japanese, and we wanted to keep the deployment under wraps for whatever reason (probably relating to the North Koreans). Somebody tells the story, and all of a sudden it’s a new ABM radar we put in Japan, nevermind that it is an engagement radar for an ATBM system.