I wouldn't mind doing the route sometime (obviously at a much more leisurely pace). @andywood , would you recommend the route? Is it nice and scenic ? I think you have just planted a seed in the crazy part of my brain
@JackTheCommuter, yes there are lights and lots of them. I didn't do any "shingo mushi" and got held up quite a bit at the big junctions through matsumoto and nagano city.
So the actual ride time is 8h 33
It's a big advantage to set out early as a lot of the smaller juntions are flashing orange (proceed with care)
@leicaman I don't know if I'd recommend the route or not, if you just wanted to do "coast to coast" then you could start out of Takao station and finish in Naoetsu which probably covers roughly the same distance.
I would try to skip the big cities or take minor roads through them
The nicest parts of the course are following the river from the north of Matsumoto to the south of Nagano, the short cut out of Nagano city up to Shinanomachi and the coastal road at the end
At a more leisurley pace you could skip Nagano city and go Togakushi ~ Myoko, which is abeautiful route
If you just want to do a nice big ride, Noto Hanto is beautiful, Sado Island is fantastic (tie it in with the earth celebration in August?) and the coast road from Niigata to Yamagata is really nice too.