Wouldn't a SFO-NRT flight do the layover in Hawaii? That seems much more direct, and in either case you're going to have to build the facilities to support the SST.
Look at the great circle route. Hawaii is way to the south. (Although Anchorage isn't quite on the way either.) As I recall when my dad was flying to Japan a lot--sometimes on the company plane--there would sometimes be refueling stops in Anchorage though that may have been leaving from Michigan.