Chris
Google
Great campground within walking distance of Unzen!
This campground is large and there are many places where a tent can be set up, so it's easy to have privacy.
There are two decent bathrooms, and there is water that is drinkable.
I stayed here in the middle of August, and it was warm in the evening and pleasantly cool in the morning.
The BEST thing about this campground is that it's within walking distance of one of Kyushu's most famous onsen towns: Unzen. You can walk to an onsen and you can walk to one of the restaurants in town. Camping, hot springs, and food and drink - it doesn't get better than that.
I CAN'T BELIEVE THAT WE HAD THIS PLACE TO OURSELVES ON A FRIDAY.