I'm heading to Japan for 2 months this fall. Leaving Sept 25. Renting a campervan and doing a lap.
I've made a map of the potential riding in Japan, but it's very hard to discern what's good and whats not:
https://www.google.com/maps/d/edit?mid=1jO6wABIAdQXQMhoU76gj4MDcLME&;ll=34.88555520507092%2C136.30168649999996&z=7
Anybody have experience over there?