You might not think it, but there are opportunities for hiking, climbing and camping around Nagoya. In fact, near by Nagano, Shiga, and Gifu Prefectures offer some of the best opportunities in Japan. Camping areas in Japan tend to be a bit more formal than just hiking off the side of the road and setting up your tent, OK, a lot more formal.
They are generally private areas set up as campgrounds, kind of like a KOA in the US, though generally with fewer amenities. The cost is negligible, but you tend to be closer to your neighbors than you might be used to in the great out doors. That being said, they are clean, comparably comfortable, and safe. If you are interested in checking out a campground why not try one of these?
3694 Togakushi, Nagano-shi, Nagano-ken
Togakushi Camp Homepage
589-17 Ueno, Nakatugawa-shi, Gifu-ken
Hananoko Auto Camp Homepage
2010-1 Chinai, Makino-cho,Takashima-shi, Shiga-ken
Makino Sunny Beach Homepage
8581-1 Tsukechi-cho, Nakatsugawa-shi, Gifu-ken
Miyajima Camp Site Homepage
5434 Ayutate, Takasu-cho, Gunjyo-shi, Gifu-ken
N.A.O Akinokougen Homepage