When the temperature drops and snow begins to blanket the mountains of central Japan, Gunma Prefecture transforms into one of the country’s most enchanting winter destinations. Just a few hours from Tokyo, this landlocked prefecture is famous for its steaming hot spring towns, dazzling winter illumination displays, and snow-covered mountain scenery that make it a perfect base for a year-end or New Year holiday escape. Whether you’re soaking in a rotenburo (open-air bath) while snowflakes drift onto your shoulders or wandering through a shimmering light tunnel with a cup of hot amazake in hand, Gunma offers a distinctly cozy, kotatsu-worthy version of Japanese winter travel that avoids the mega-crowds of Tokyo or Kyoto.

Why Gunma Is Japan’s Underrated Winter Onsen Destination

Gunma is often called the ‘Onsen Prefecture’ thanks to its abundance of natural hot springs fed by volcanic activity from Mt. Asama and Mt. Kusatsu-Shirane. In winter, the contrast between icy air and steaming mineral-rich water is at its most dramatic and therapeutic. Add to this the region’s growing reputation for elaborate winter illumination festivals, and you have a getaway that combines relaxation, romance, and festive sparkle in equal measure. Because Gunma sees fewer international visitors than Hakone or Nikko, travelers who plan a New Year trip here can enjoy a more tranquil, snow-draped atmosphere, even during the busy holiday season.

Kusatsu Onsen: Steam, Snow, and the Iconic Yubatake Glow

Kusatsu Onsen is arguably Japan’s most famous hot spring town, and in winter it becomes a true snow-globe scene. At the heart of town, the Yubatake (‘hot water field’) channels steaming acidic spring water down wooden troughs, and on winter evenings the surrounding area is lit up with soft illuminations that reflect off fresh snow. Visitors can watch the traditional yumomi water-cooling performance, browse cozy izakaya serving warming dishes like oyaki and nabe hot pot, and soak in both public footbaths and full-immersion baths scattered throughout town.

  • Best illumination viewing: early evening (5:00–7:00 PM) around the Yubatake plaza, when the crowds are lighter and the lighting is most vivid against the dusk sky.
  • Hatsumode option: Kusatsu Onsen Shrine sits right beside the Yubatake, making it easy to combine a New Year shrine visit with an evening onsen soak.
  • Cold-weather tip: the ground around the Yubatake can be icy; wear boots with good grip, as sandals or smooth-soled shoes are a common cause of slips.

Ikaho Onsen: Stone Steps, Golden Waters, and Illuminated Ambiance

Ikaho Onsen is known for its picturesque 365-step stone staircase lined with ryokan, souvenir shops, and shrines, all connected by mineral-rich ‘golden water’ (kogane-no-yu) baths. In the colder months, the stairway and surrounding streets are decorated with warm lantern-style lighting that creates a nostalgic, storybook atmosphere as steam rises from nearby baths. At the top of the steps, Ikaho Shrine is a popular hatsumode destination, and the approach is especially beautiful when dusted with snow.

  • Nearby highlight: Ikaho’s observation areas offer views over the Kanto plain; on clear winter nights, the combination of illuminated streets and starry skies is a favorite subject for photographers.
  • Crowd avoidance strategy: visit on a weekday morning or right after New Year’s Day (January 2–3) rather than December 31–January 1, when the shrine approach can be packed with hatsumode visitors.
  • Practical tip: bring a small towel and change of socks; walking up wet stone steps in winter means damp feet can quickly become cold feet.

Minakami Onsen: Snow Country Adventure Meets Hot Spring Relaxation

For travelers who want to pair their onsen getaway with snow activities, Minakami is the answer. This area in northern Gunma is a gateway to skiing, snowshoeing, and river gorge walks, and its collection of onsen ryokan — including the rustic Takaragawa Onsen with its massive riverside open-air baths — are especially magical when snow is falling. While Minakami’s illumination displays tend to be smaller and more intimate than Kusatsu or Ikaho, some ryokan and roadside stations set up seasonal light displays and cozy market stalls selling hot sake and roasted chestnuts.

  • Great for: travelers combining a ski or snowshoe day trip with an evening soak and illumination stroll.
  • Access: Jomo-Kogen Shinkansen station connects easily to central Tokyo, making Minakami a convenient overnight or weekend base.
  • Cold-weather prep: temperatures here can dip well below freezing after dark, so pack thermal base layers, a windproof outer shell, and hand warmers (kairo), which are sold at nearly every convenience store in the region.

Manza Onsen and Other High-Altitude Retreats

For a more remote, snow-country experience, Manza Onsen — one of Japan’s highest-altitude hot spring villages — offers milky white sulfur baths surrounded by silent, snow-laden forests. While illumination events here are minimal compared to the larger towns, the sheer beauty of steam rising against a backdrop of untouched snow makes it worth the detour for travelers seeking quiet over spectacle.

Sample 3-Day Winter Illumination Itinerary

  • Day 1: Arrive in Kusatsu via limited express train and bus; check into a ryokan, enjoy the Yubatake illumination and yumomi show in the evening.
  • Day 2: Travel to Ikaho Onsen; climb the stone steps, visit Ikaho Shrine, and enjoy the evening lantern illumination along the main street.
  • Day 3: Head to Minakami for a snowshoe walk or ski session, followed by a soak at an open-air riverside bath before returning to Tokyo via the shinkansen.

Practical Tips for a Winter Onsen Getaway

  • Layer smartly: Wear breathable thermal layers under a warm coat, since you’ll be moving between heated ryokan interiors and freezing outdoor illumination areas frequently.
  • Footwear matters: Snow boots with non-slip soles are essential, especially on stone steps and near hot spring runoff, which can freeze into black ice.
  • Book early for New Year: Ryokan around Kusatsu and Ikaho fill up quickly for the December 30–January 3 period; reserve at least one to two months ahead if traveling during peak New Year dates.
  • Avoid peak hatsumode hours: If visiting a shrine for New Year prayers, arrive either very early morning or in the late afternoon on January 2 or 3 to skip the largest crowds seen on January 1st.
  • Onsen etiquette in winter: Rinse off fully before entering communal baths, and be mindful that steam and cold air can make stone bath areas slippery — move slowly.
  • Transportation planning: Winter weather can cause train and bus delays in mountainous areas; build buffer time into your schedule and check real-time transit updates, especially after heavy snowfall.
  • Stay hydrated: Soaking in hot springs in cold weather can dehydrate you faster than you’d expect; drink water before and after each bath.

Final Thoughts

A winter getaway to Gunma’s onsen towns offers something increasingly rare in Japan travel: the ability to experience dazzling seasonal illumination, meaningful New Year traditions, and deeply relaxing hot spring culture without fighting through overwhelming crowds. Whether your priority is romantic light displays reflected in snow, a peaceful hatsumode shrine visit, or simply thawing out in a steaming rotenburo after a day in the cold, Gunma delivers an evergreen winter experience that rewards travelers year after year, no matter which holiday season brings them there.