you seem to have a fairly good idea of where you want to go, and what you want to see.
the only thing i would suggest is give yourself one full day to recoup from Jet Lag at the beginning..
it took me a little while when i first arrived; but then, by the time we'd got off the plane, had a meeting in Tokyo then got the train to Kyoto, then another to out friend's village (and the car journey back) we'd been travelling for at least 40 hours solid (including the plane journey / getting to the airport in the UK)
hope you have fun; and please post up some pics when you get back