Ski Areas in Gunma Gunma Ski Resorts Gunma is a region of Japan offering skiing and snowboarding in 2 Japanese Ski Resorts, including Kawaba and Oze Iwakura. Snow Forecasts for Gunma No significant snow is forecast for ski resorts here right now. Gunma Ski Resorts Ski Resorts in Gunma Ski Resort Pistes Top Beginn. Interm. Experts Kawaba12km1,870m--- Oze Iwakura19km1,703m-