Rainy Day in Gunma: Best Indoor Spots & Activities

The Museum of Modern Art, Gunma (Gunma Kenritsu Kindai Bijutsukan)

Standing quietly within the lush greenery of Gunma-no-Mori in Takasaki City, this is a richly rewarding art space known to those in the know. It is precisely on days when raindrops quietly wet the trees that the museum's appeal deepens.

The greatest highlight is the collection of works by Ogiwara Rokuzan, the genius sculptor produced by Maebashi. His forms, which seem to carve the cries of the soul into stone, seep slowly into the heart as you face each one in the hushed galleries. In addition to the permanent exhibition, the museum holds a broad collection of modern and contemporary art from Japan and abroad, and many travelers are surprised, saying "it was far more serious than I expected." It is a hidden gem of a museum that Gunma can be proud of.

Hidden gem information: Gunma-no-Mori, the site on which the museum stands, is itself a vast park, and a stroll there after the rain lifts is recommended. The museum shop inside sells original goods with motifs from Rokuzan's works, perfect as souvenirs of your trip.

Best season: It can be enjoyed year-round, but May to June with its fresh greenery and October to November during the autumn foliage are especially exceptional, combined with the scenery of the forest. Weekday mornings are uncrowded, allowing for a leisurely viewing.

Tips for travelers: Allow 1 to 1.5 hours for your visit. Special exhibitions can get crowded, so checking the official website in advance is recommended.

Tomioka Silk Mill (Tomioka Seishijo) — Indoor Tours Available

If you are visiting Gunma on a rainy day, this is the first place to put on your list. Registered as a UNESCO World Cultural Heritage Site in 2014, it is a miraculous place where a Meiji-era silk reeling factory remains exactly as it was.

The brick buildings lined up across the vast grounds take on an even more vivid red when wet with rain, creating an extraordinary feeling as though you have slipped back in time. The main points of the tour — the Silk Reeling Plant, the East Cocoon Warehouse, and the West Cocoon Warehouse — can all be entered under a roof, so you can immerse yourself fully in Meiji romance without an umbrella. On the guided tour (fee required), the lives of the female factory workers of the time and the passion poured into Japan's modernization are explained vividly, giving your visit an entirely different depth.

Hidden gem information: "Tomioka Seishijo Dori," the street spreading out in front of the mill's main gate, is dotted with small shops selling local gourmet food and sundries. After the tour, stopping by a restaurant serving the local specialty "konnyaku cuisine" is the local way to enjoy the visit.

Best season: During the cherry blossom season (late March to early April), the contrast between the blossoms on the grounds and the red brick is spectacular. To avoid the crowded summer season, a weekday visit in autumn or winter is the target.

Access: About a 7-minute walk from "Joshu-Tomioka Station" on the Joshin Electric Railway. Access is comfortable, about 40 minutes from Takasaki Station by the Joshin Electric Railway. Allow about 1 hour for the tour alone, or 1.5 to 2 hours including the guided tour.

Gunma Museum of Natural History (Gunma Kenritsu Shizenshi Hakubutsukan)

"There are dinosaurs!" If you want to see the moment a child's eyes light up, head here without hesitation. The Gunma Museum of Natural History in Tomioka City lets you dynamically experience 4.6 billion years of Earth's history, and adults find themselves just as absorbed.

Entering the lobby, the first thing to greet you is a life-size dinosaur robot. Its overwhelming scale and realistic movements instantly lift the spirits not only of children but of adults too. The exhibits are arranged chronologically from the age of the dinosaurs to modern ecosystems, letting you learn deeply about the rich natural history nurtured by Gunma's land. Displays of actual fossils and hands-on corners are also plentiful, and you can spend such a fulfilling half-day that you forget the time on a rainy day.

Hidden gem information: The museum sees many group visits from local elementary and junior high school students, but the late afternoon is relatively empty and allows for unhurried viewing. The museum shop has a wide variety of dinosaur goods, ideal for souvenirs.

Best season: It can be enjoyed throughout the year, but the summer vacation period is very busy with families. Those who want to avoid the crowds should choose a weekday in spring or autumn. Allow 2 to 3 hours for your visit.

Tips for travelers: Since it is in the same city of Tomioka as the Tomioka Silk Mill, it is efficient to visit the two spots as a set. Going in the order of Tomioka Silk Mill to the Museum of Natural History makes the travel between them smooth.

Ikaho Onsen

Climbing the 365 stone steps slowly, accompanied by the sound of rain. That alone makes the noise of everyday life seem to fade quietly away. Ikaho, one of Gunma's representative hot spring towns, is a spot that shows its true worth precisely on rainy days.

The cobbled stone-step street is lined with long-established hot spring manju shops, shooting galleries, and small stores selling local souvenirs, so you can wander and explore with an umbrella in hand even in the rain. The sight of mist hanging over the inn district as you look down from the top of the steps is like a scene from a film in which the sentiment of the Showa era remains intact. There are two kinds of hot spring water, the Kogon-no-Yu (golden, brownish) and the Hakugin-no-Yu (silver, clear), and day-use bathing facilities are plentiful, so even those not staying at an inn can easily enjoy the hot springs.

Hidden gem information: "Ikaho Jinja," located at the top of the stone steps, has relatively few tourists and allows for a quiet visit. A little further afield, the area around "Kajika Bashi" is a local hidden gem boasting spectacular scenery during the autumn foliage season.

Best season: Early summer with its fresh greenery and autumn with its foliage are especially beautiful seasons. On rainy days the atmosphere is greatly enhanced, and combined with the hot springs it makes for a perfect day of healing. Many hot spring inns accept day-use bathing, and the early morning hours are the least crowded.

Tips for travelers: Accessible by bus from Takasaki Station or Shibukawa Station (about 25 minutes from Shibukawa Station). The stone steps are slippery on rainy days, so visiting in easy-to-walk shoes is strongly recommended.

Kusatsu Onsen (Indoor Facilities Around the Yubatake)

Kusatsu is Japan's finest hot spring town, one it can proudly show the world. The "Yubatake" that springs up at its center sends steam rising toward the sky even in the rain, creating a fantastical scene. Viewing it while holding an umbrella has a charm quite different from a sunny day, and it is an original landscape of Gunma that you will never forget once you have seen it.

There are several day-use hot spring facilities around the Yubatake, and among them "Sainokawara Rotenburo" is a popular facility boasting a vast open-air bathing area. Part of it is covered by a roof, so even on rainy days you can enjoy a luxurious moment wrapped in the steam. At "Netsu-no-Yu," which faces the Yubatake, you can also watch a demonstration show of Kusatsu's traditional "yumomi" (fee required, entirely indoors), making it perfect for sightseeing on a rainy day.

Hidden gem information: "Sainokawara Dori," where the souvenir shops around the Yubatake are gathered, has a roofed arcade and is ideal for shopping on rainy days. Cosmetics made with the local specialty hot spring water and the "yunohana" (hot spring mineral flowers) unique to Kusatsu are recommended souvenirs that also serve as mementos of your trip.

Best season: Summer is highly popular as a summer retreat, and in winter the collaboration of snowy scenery and rising steam is magical. Every season has its own charm. To avoid the peak crowds, the trick is to move early on a weekday morning.

Access: Accessible by bus from Takasaki Station and Karuizawa Station (about 2 hours 20 minutes from Takasaki Station, about 1 hour from Karuizawa Station). By private car, allow about 1 hour from the Shibukawa-Ikaho IC on the Kan-Etsu Expressway. There is also a large parking lot near the Kusatsu Onsen Bus Terminal.

Access Information

The spots within Gunma Prefecture can be toured efficiently by combining trains, buses, and a private car.

If using rail and bus:

• Tomioka Silk Mill: About 40 minutes from Takasaki Station on the Joshin Electric Railway, get off at "Joshu-Tomioka Station," then about a 7-minute walk
• Gunma Museum of Natural History: About 10 minutes by taxi or bus from Joshu-Tomioka Station (visiting as a set with the Tomioka Silk Mill is recommended)
• The Museum of Modern Art, Gunma: By bus from Takasaki Station, get off at "Gunma-no-Mori," a short walk away (about 20 minutes)
• Ikaho Onsen: About 25 minutes by bus from Shibukawa Station
• Kusatsu Onsen: About 2 hours 20 minutes by bus from Takasaki Station, about 1 hour by bus from Karuizawa Station

If using a private car: You can reach each spot using the "Takasaki IC," "Fujioka IC," or "Shibukawa-Ikaho IC" on the Kan-Etsu Expressway as your starting point. On rainy days, please take ample care against skidding on mountain roads and mountain passes.

Tips for travelers: Travel distances within Gunma Prefecture tend to be long, so a rental car is the most convenient option if you plan to visit several spots in one day. There are several rental car companies around Takasaki Station, and combining this with Shinkansen access makes the trip much smoother. On rainy days, please watch the road conditions and enjoy your journey through Gunma with a schedule that allows plenty of time.