[pfdietz]

Given that Concorde's maximum range is less than the distance from Tokyo to Dallas, I suspect you'd end up saving little time on that leg with it, as you'd add an extra stop. The rest of your trip sounds like mostly waiting in airports. How does an SST help with that? If anything, the lower traffic on expensive SST flights would tend to make the flights less frequent, increasing those waits. It might end up taking longer.