Steam drifts over wooden flumes, mountains fold into mist, and shrines cling to cliffs where cedar roots meet stone. This is Gunma, Japan, a prefecture shaped by volcanoes and softened by mineral-rich springs. From Kusatsu’s bubbling Yubatake to the quiet boardwalks of Oze National Park, Gunma offers a rhythm of slow travel and clear air. Whether you come for riverside baths,…