Oze is a national park in northern Gunma, known for Ozegahara Marsh and Ozenuma Pond. The area was formed in the ice age around 10,000 years ago, and plants that evolved from that era still flourish.
In spring, summer, and autumn, the area is a popular hiking spot, with elevated boardwalks on the marsh and around the pond. There are three trailheads from Gunma prefecture: Hatomachitoge, Oshimizu and Fujimishita, with various hiking routes of various lengths and difficulty. In winter, Oze is covered in snow.
Numata and Kawaba are convenient spots to stay within the Oze area. Numata is well-connected by train to Gunma’s main destinations. Try fruit picking at nearby farms. Kawaba is a quieter, rural option where you can stay in a traditional onsen ryokan.
In winter, snow covers mountains around the area and it makes a good opportunity for a ski trip.