Manza Onsen

Manza Onsen is a high-altitude volcanic spa in Tsumagoi Village, Gunma Prefecture, situated at approximately 1,800 meters in the Joshinetsu Kogen National Park — one of Japan's highest onsen destinations — where sulfurous and siliceous waters from the volcanic Shirane and Kusatsu volcanic systems emerge with an exceptionally high sulfur content that gives the milky waters their distinctive appearance and pungent aroma. These mineral-rich waters have been prized for the comfort they leave on the skin since ancient times, within a long thermal tradition, and the high-altitude alpine setting with views of the volcanic peaks and highland marshlands makes Manza one of the most dramatically situated onsen destinations in Japan's renowned Gunma hot spring cluster. Winter at Manza Onsen transforms the landscape into a snow-covered alpine paradise, making it a beloved combination of skiing and outdoor hot spring bathing in the crisp mountain air of the Joshinetsu highlands.