What to know
Perched 1,800 meters above sea level on the slopes of Mount Shirane in northwestern Gunma Prefecture, Manza Onsen (万座温泉) is a hot spring resort town renowned for its highly acidic waters, which boast the highest sulfur content in Japan. Sourced from Mount Shirane, these waters are believed to boost metabolism and circulation, offering various health benefits.
Manza Onsen is home to numerous hotels and ryokan featuring exceptional hot spring baths. The open-air baths are especially delightful, offering superb water quality and a serene atmosphere. With guaranteed snowfall in winter, the town is one of the best spots near Tokyo for enjoying an outdoor bath in the snow. Below is a list of recommended ryokan and hotels that welcome both overnight guests and day visitors to their baths.