Japan's Yosemite.

There are lots of ways to get there. This is the one I know:
You are heading north on Route 141; you go up and up through Kiyosato and hit Nobeyama; turn right at the first junction after a fork at a traffic signal - Kawakamimura is prominently signposted.
Follow this road for 3 or 4 km till you start going downhill and hit another prominent sign for Kawakamimura; turn right and follow this road up and down till it ends at a T-junction (at a big supermarket called Nana's - last chance for a decent stock-up - opens at 9am).
Turn right and follow this road towards Akiyama; just before the village, as you climb an S-bend with a tractor shop, turn right up the Akiyama bypass - this is the second of two right-turns very close together. The sign is not clear, but don't worry if you miss it - you can take the old road: follow the road through Akiyama and turn right just after the village at a sign for Kawahage (there is also a convenience store - with veg and booze - on the right 100m before this turning).
Turn right at the top of the bypass to rejoin the old road. Follow this road for about 3km (across a bridge and up a hill through Kawahage village) till you start going downhill and round an S-bend; as you start to come out of the bend, the road forks - take the righthand, uphill fork (i.e. don't go under the elaborate gate).
Stay on this road till it disappears into woods and forks again - take the righthand, uphill fork again; follow this to the barrier that marks the beginning of the campsite.
If you want to punch a phone number into your funky satellite navigation system, the number of the phone in the lodge is 0267-99-2428.
Google map says it's here.