We made it back. The return trip started at 7pm local time (Tokyo time), so it was analogous to night for the girls and they slept about half the time. Much nicer. Hirono and I each got about an hour of sleep as well.
All three girls are now fed and sleeping. It was somehow very touching to see them eat heartily and instantly fall asleep when they were put in their own beds. All three seem so happy and content. I'm off to the grocery store. NHE starts up again tomorrow.