Gunma Prefecture does not feature on the typical family Japan itinerary, but it absolutely should. Within a two-hour radius of Tokyo, this mountain prefecture delivers safari wildlife encounters, real dinosaur fossils, Japan’s finest ski resort with family-oriented facilities, boardwalk nature walks through pristine wetlands, and the country’s most storied hot spring town. Children of different ages find their own reasons to love Gunma: younger kids go wide-eyed at lions and giraffes, older ones have genuine palaeontological discoveries to explore, and teenagers who dismiss cultural sightseeing will accept a ski lesson or a trek through national park woodland without complaint. For parents, Gunma’s compact geography means you can pack more into two days here than almost anywhere else within easy reach of Tokyo.

Gunma Safari Park

Gunma Safari Park, located near Tomioka in the southern part of the prefecture, is one of the most accessible large-scale wildlife parks in the Kanto region. It operates on the same principle as its more famous counterparts in Africa: animals roam large, fenced enclosures while visitors travel through by vehicle, experiencing proximity to wildlife that a conventional zoo simply cannot replicate.

Drive-Through and Walk-Through Zones

Families with a rental car can drive through the main safari zone at their own pace, watching lions, tigers, cheetahs, elephants, giraffes, zebras, and bears from inside the vehicle. For those who prefer not to drive, the park operates a safari bus on a fixed circuit through the same enclosures. The walk-through section beyond the drive zone houses primates, smaller mammals, birds of prey, and a petting area where children can interact with goats and other domesticated animals. Keeper feeding sessions run at scheduled times throughout the day and are listed on notice boards near the entrance.

Prices and Access

Adult entry is approximately ¥2,000, with reduced rates for children. The park is most conveniently reached by car from the Joshinetsu or Kan-Etsu Expressway, and is roughly 30 minutes by car from Tomioka Station. Combining a safari park visit with the nearby Tomioka Silk Mill (¥1,000 adult entry) makes for a full and varied day.

Gunma Dinosaur Museum

In the small town of Kanna in southeastern Gunma, the Gunma Dinosaur Museum houses one of the most impressive palaeontological collections in Japan, built around genuine fossil discoveries made in Gunma and the broader region. Entry costs ¥750 for adults, with further reductions for children, making it outstanding value.

Real Fossils and Interactive Exhibits

The centrepiece of the museum is a high-ceilinged main hall displaying mounted dinosaur skeletons at dramatic scale. The specimens are accompanied by detailed explanatory panels in both Japanese and English. The museum does not rely solely on dramatic display: the research wing shows the actual process of fossil extraction and preparation, and the geology exhibits explain how Gunma’s mountains came to contain Cretaceous-era remains. For children old enough to follow the narrative — roughly seven and above — the museum provides a genuinely educational experience rather than simple spectacle. Younger children still respond strongly to the scale of the mounted skeletons.

The museum is easiest to reach by car. Allow at least two hours for a thorough visit, and note that the attached cafe serves lunch on weekdays.

Kusatsu Ski Resort with Kids

Kusatsu International Ski Resort is not just a destination for serious skiers. The resort’s beginner slopes are well-maintained and served by dedicated lifts that keep learners separated from faster traffic, and the ski school accepts children from around six years of age, with instructors experienced in teaching young, nervous beginners. A day pass costs ¥4,500 per adult, with junior rates available.

Family Baths and Winter Appeal

The town of Kusatsu below the resort makes the combination particularly special for families. After a day on the slopes, the public baths at Sainokawara (¥600) and Otakinoyu (¥600) welcome families, though children should be supervised closely given the high temperatures of Kusatsu’s thermal water. Many ryokan and guesthouses in the town offer private family baths that can be booked by the hour, allowing parents to bathe comfortably with young children without navigating shared bath etiquette. The Yubatake hot spring field in the town centre is free to walk around and makes an atmospheric evening stroll. The resort operates December through late March.

Oze National Park Family Walk

Oze National Park, in the northern corner of Gunma near the Fukushima border, protects one of Japan’s most pristine high-altitude wetlands and is traversed by an 8-kilometre elevated wooden boardwalk that makes the terrain accessible to walkers of almost all abilities. The park is open from early June through late October.

What to See

The peak attraction is the mizubasho, or Asian skunk cabbage, which blooms in late May and early June, carpeting the wetland floor with white spathes against emerald green foliage. Later in summer the boardwalk passes through grasslands and along the shores of Lake Ozenuma, and autumn transforms the surrounding forest in late September and October. The flat, well-maintained boardwalk is suitable for children seven and older who are comfortable walking several kilometres. Entry to the park itself is free, though shuttle buses from Numata or Oshimizu take around 90 minutes and carry a fare. Pack rain gear and insect repellent regardless of the forecast.

Ikaho with Kids

Ikaho Onsen, built on a steep hillside about an hour from Takasaki, centres on a staircase of 365 stone steps lined with small shops, cafes, and bath facilities. For children, ascending the steps is a manageable adventure rather than a chore, and the compact layout keeps the family together naturally.

Chateau de Jikokudani and Mizusawa Udon

A short drive from Ikaho, Chateau de Jikokudani operates as a children’s recreation and dinosaur-themed play park, with outdoor equipment, a mini train, and interactive exhibits. It provides an excellent morning activity before descending to Ikaho for lunch.

Mizusawa udon, considered one of Japan’s top three udon varieties, is served at a cluster of dedicated restaurants a short distance from the Ikaho stone steps. The thick, chewy noodles in cold dipping broth or hot soup are accessible to most children, and the restaurant strips offer cheerful, family-friendly environments. Most Mizusawa udon restaurants serve lunch only, so aim to arrive between 11:30 and 13:00.

First Onsen Experience for Kids

Gunma is an ideal prefecture for introducing children to Japan’s onsen culture, partly because the high concentration of onsen towns means options are plentiful, and partly because smaller, less crowded public baths are easy to find outside peak periods.

Etiquette Tips for Families

The fundamental rules are consistent across all onsen: wash thoroughly at the shower stations before entering the bath, keep your hair out of the water, and avoid making noise that disturbs other bathers. Towels are not taken into the main bath. For very young children, or for families who feel more comfortable with privacy, most ryokan and mid-range guesthouses in Ikaho, Kusatsu, and Minakami offer kashikiri (private rental) baths that can be booked for exclusive family use by the hour. These typically cost ¥1,000 to ¥2,000 for 45 to 60 minutes and remove any anxiety about etiquette or other bathers' reactions. Check in advance whether young children are welcome at shared public baths, as policies vary.

Suggested 3-Day Family Itinerary

Day 1 — Tomioka area: Morning at Gunma Safari Park, afternoon at Tomioka Silk Mill, overnight in Tomioka or Maebashi.

Day 2 — Ikaho and Gunma Dinosaur Museum: Morning drive to Kanna for the Dinosaur Museum, then north to Ikaho for the stone steps, Chateau de Jikokudani play park, and a Mizusawa udon lunch. Private family bath at an Ikaho ryokan in the evening.

Day 3 — Kusatsu: Drive or bus to Kusatsu Onsen. Morning walk around the Yubatake field, afternoon public bath at Sainokawara, early evening stroll through the town before returning to Tokyo by highway bus or JR.

For families visiting in winter (December to March), swap Day 3 for a ski day at Kusatsu International Ski Resort.

Practical Tips

  • Car rental is strongly recommended. A rental car from Takasaki or Maebashi significantly expands your options, particularly for Kanna, Tomioka, and Oze. Public transport connects Kusatsu and Ikaho but requires more planning.
  • Rainy day options: Gunma Dinosaur Museum, Gunma Safari Park (indoor zones), and onsen baths all work well on wet days.
  • Onsen temperatures: Kusatsu’s water is exceptionally hot and acidic. Supervise children closely and limit bath time to three to five minutes.
  • Advance booking: Kusatsu ryokan with private family baths book out weeks ahead on weekends in winter. Reserve early.
  • Oze timing: June is ideal for the mizubasho flowers. Late September to mid-October offers spectacular autumn foliage but brings cooler temperatures at altitude.