Three interviewers with different affiliations with JET (JET Alumni President in D.C., Embassy employee from Japan, and long ago JET participant/alumnus). Two were very nice and one was very rude and asked stupid questions, and proceeded to give me funny, "unbelievable" looks when I clarified her objectively bad questions. You get funneled into a room to talk to other interviewers while you all wait for your time slot. Be aware that interviewers could be in the room, so be on your best behavior.