Yes it does. I recently took flights via Japan to the US with JAL on Amex Plat Companion fares. Around $5.5k each including taxes. Plus earned 480 status credits. They do even cheaper fares with Delta to the US around $4k with lie flat biz seats.
They have a whole heap of both companion fares and discount single traveller fares as well. Airlines include Cathay, V Australia, Virgin Atlantic, Singapore, Etihad, Delta, JAL and a few others I believe.