Just FYI, you can be quite creative with the route so long as you make a "return" booking.
I was able to do SFO-NRT, NRT-BKK, then NRT-SFO to return. I was charged 110k for (SFO<->NRT in first) and 32.5k for NRT-BKK one way in biz. The reps are very knowledgeable and friendly too.