Up in the Shiobara area there is a mountain called Mt. Fuji. Its nothing like the Mt. Fuji we all know. Its a nice walk, but frankly, I'd recommend Numappara or Nasu or our favorite Yaita walk (not written about yet) before Mt. Fuji. Though it might be very beautiful in autumn I think. We'll be back then to check.
Its a fairly short walk which you can start from the nearby hot spring village or you can drive through the village and turn left just before the vegetable stands and park at the parking area. Or you can continue a bit further, turn right again and park at the much larger marshland parking area. I've tried to size the Map Location
so you can see the town and all the roads. The walk around the lake was not possible due to typhoon flooding, but that looks very good for autumn.
The walk itself is a couple of hours if you walk right around the mountain. Its green and beautiful. No matter where you start you will walk by town and there is a short side trip to see the marshes. There are a couple of short steep bits but its an easy walk overall. You walk past an area where the volcanic gasses are coming up from the ground. It smells sulphurous.
I'll write about our stay at the hot spring hotel in a separate post.