📅 Last updated · 最終更新:2026年5月24日
Kanto / 関東

Gunma

群馬県

Top Gunma souvenirs and must-visit travel spots — your complete guide for visitors to Japan. Japan’s most potent hot spring, a stone-stepped onsen town frozen in the Meiji era, white-water rivers and a UNESCO silk mill — Gunma packs more variety than any other landlocked prefecture.

🌸 Best Season: All year (onsen); June–Aug (rafting, alpine flowers); Oct–Nov (foliage)
✈️ Access: Limited Express Kusatsu-Shima from Ueno to Naganohara-Kusatsuguchi, then JR bus (~3 hr total); or highway bus from Shinjuku (~4 hr)
🗣️ Language: Japanese / 日本語
💴 Currency: ¥ JPY

Gunma is hot-spring country — Kusatsu, with the biggest natural spring flow in Japan, plus Ikaho’s stone staircase and the UNESCO Tomioka Silk Mill. The souvenirs follow the onsen towns: Kusatsu’s onsen-manju, Gunma’s distinctive skewered, miso-glazed yaki-manju, konjac products, and Takasaki’s daruma dolls. Onsen-manju is best eaten within a day or two, so buy it as you leave town rather than at the start.

群馬は温泉県——自然湧出量日本一の草津、石段の伊香保、世界遺産の富岡製糸場。みやげも温泉地ごとに、草津の温泉まんじゅう、群馬名物の焼きまんじゅう(串・味噌だれ)、こんにゃく製品、高崎のだるま。温泉まんじゅうは日持ちが1〜2日と短いので、行きより帰りに買うのがおすすめです。

Recommended Omiyage

おすすめおみやげ 5選

Yaki Manju

Yaki Manju

焼きまんじゅう

Gunma’s most beloved street food, yaki manju is a stack of 4 plump steamed buns skewered together, glazed with a sweet-savory miso-based sauce, and grilled over open flame until the surface crackles to caramel-brown perfection. The interior is light, slightly chewy, and absorbs the umami glaze beautifully — making each bite a balance of crisp, soft, sweet, and salty. The most legendary shops include Harashimaya Sohonke (Maebashi, est. 1857) and Orita (Takasaki), where lines form regardless of weather. Many shops sell take-home raw sets (around ¥1,080 for a 12-bun pack) that you can grill at your own pace. Eat hot and fresh; they don’t reheat well after a day. The smell wafting from a yaki manju stand is pure Gunma nostalgia.

Street Food ¥170–250 Gunma Soul 📅 Best within 3 days🎯 Local snack, travelers
Kusatsu Onsen Manju

Kusatsu Onsen Manju

草津温泉まんじゅう

Kusatsu Onsen, one of Japan’s three most famous hot-spring towns, has a beloved tradition of “onsen manju” — small bean-paste-filled steamed buns sold at countless shops along the bath-town streets, often handed out warm in paper bags as visitors stroll between baths. The signature golden-brown skin, made with brown sugar and steamed over actual onsen-heated steam at some shops, has a faintly molasses-like flavor that pairs perfectly with strong green tea. Famous shops include Honke-Chichiya and Matsumura Manju, both within walking distance of the iconic Yubatake (hot-water field). Boxed assortments make charming Kusatsu souvenirs. About 3 hours from Tokyo via JR limited express + bus.

Manju ¥100–200 Onsen Town 📅 Best within 3–4 days🎯 Onsen visitors, elderly
Kiryu Silk Textile

Kiryu Silk Textile

桐生の絹織物

Kiryu has been Japan’s silk-weaving capital for over 1,300 years — its position in a small valley with abundant pure water, mulberry-friendly climate, and centuries of accumulated craftsmanship made it the elite producer of silk for emperors, samurai, and modern haute couture. Kiryu-ori (Kiryu weaving) features ultra-fine threads, intricate jacquard patterns inspired by classical Japanese motifs, and durable yet luxuriously soft texture. Browse the Kiryu Textile Museum (Kiryu Orimono Kinenkan), founded in a registered historic building, then visit working studios where you can purchase scarves (¥3,000-15,000), neckties, kimono fabric, and handbags. Kiryu’s silk is prized by major Japanese fashion houses and high-end designers.

Textile ¥2,000–15,000 Traditional Craft 📅 Lifetime keepsake🎯 Premium gifts, fashion lovers
Ikaho Manju

Ikaho Manju

伊香保まんじゅう

Often called the original Japanese onsen manju, Ikaho Manju was reportedly invented in 1910 at Shougetsudo in Ikaho — a brown-sugar-infused steamed bun whose distinctive amber color and rich molasses flavor distinguishes it from Kusatsu’s lighter version. The story goes that the inventor, inspired by Ikaho’s iconic brown-tinged “golden waters” (kogane no yu), tried to capture the spring’s color in confectionery form using muscovado sugar. The bun’s tender skin, slightly chewy and perfumed with brown sugar, encloses smooth red bean paste in a perfectly bite-sized package. Shougetsudo’s main store near the top of the famous Ikaho stone steps still hand-makes them daily. Boxed assortments (6 to 24 buns) are sold at the main shop.

Manju ¥100–150 Ikaho 📅 Best within 2 days🎯 Onsen visitors, families
Konnyaku

Konnyaku

こんにゃく

Gunma produces over 90% of Japan’s konnyaku — a low-calorie, high-fiber traditional food made from the konjac root that grows abundantly in the mountains around Shimonita. The texture is unique: gelatinous yet slightly chewy, with no inherent flavor that absorbs broths and seasonings beautifully. Beyond traditional gray block konnyaku for nimono and oden, Gunma’s modern konnyaku-makers craft konnyaku noodles (shirataki), tofu-style konnyaku, sashimi-style sliced konnyaku for raw eating with miso, and even konnyaku desserts. The Konnyaku Park (Konnyaku Park) in Kanra offers free factory tours, all-you-can-eat konnyaku tasting buffets, and a vast gift shop. Available at JR Takasaki Station, roadside stations, and Konnyaku Park.

Health Food ¥300–800 #1 Producer 📅 Up to 90 days🎯 Health-conscious, diet

Must-Visit Spots

おすすめスポット 5選

Kusatsu Onsen

Kusatsu Onsen

草津温泉

Considered Japan’s premier hot spring for centuries, Kusatsu Onsen has ranked #1 in Japan’s national onsen rankings for over 20 consecutive years — its waters are extraordinarily acidic and sulfur-rich, with antibacterial properties so strong they can kill many pathogens within about a minute. The town’s signature centerpiece is the Yubatake, a wooden cooling channel system in the central plaza where steaming spring water flows in geometric patterns, releasing thick clouds of mineral-rich steam visible from blocks away. Watch the traditional “yumomi” performance where kimono-clad women cool the water by stirring it with long wooden paddles to traditional songs. Public bath “Sai-no-Kawara Rotenburo” is one of Japan’s largest open-air baths (about 500㎡). About 3 hours from Tokyo.

Onsen Always Free (baths vary)
Ikaho Onsen

Ikaho Onsen

伊香保温泉

Famous for its 365-step stone staircase (Ishidan-gai) that climbs through the heart of the town, Ikaho Onsen is one of Japan’s most cinematically arranged hot-spring towns — historic ryokan, souvenir shops, manju steamers, and traditional cafes line the steps from base to summit. The two distinctive springs are “Kogane-no-Yu” (Golden Water, iron-rich brownish) for women’s beauty and circulation, and “Shirogane-no-Yu” (Silver Water, clear) for everyday wellness. Built by Sengoku-era warlords for soldier recovery, Ikaho’s history is rich with literary visitors including Tokutomi Roka who set his masterpiece “Hototogisu” here. Combine with nearby Mount Haruna and Lake Haruna for a perfect Gunma weekend. From JR Shibukawa Station, buses run roughly every 30–60 minutes (about a 25-minute ride).

Onsen Varies ¥400–800
Tomioka Silk Mill

Tomioka Silk Mill

富岡製糸場

Designated a UNESCO World Heritage Site in 2014, Tomioka Silk Mill is a remarkably preserved 1872 industrial complex that revolutionized Japan’s modernization — establishing silk as the country’s main export and funding the Meiji-era industrial revolution. The mill, guided by French silk expert Paul Brunat, was the world’s largest silk-reeling factory at its opening, employing hundreds of young women from across Japan in a state-of-the-art operation that combined Western technology with Japanese craftsmanship. The original wooden warehouses, brick reeling building, and dormitories survive intact, and the museum displays original machinery, historical photographs, and stories of the workers. About 40-minute guided tours (¥200) bring the past to life. From Joshu-Tomioka Station on the Joshin Dentetsu line, a 10–15-minute walk. Open daily except year-end (Dec 29–31).

UNESCO 9–17 ¥1,000
Minakami Rafting

Minakami Rafting

水上ラフティング

Minakami’s Tone River, fed by snowmelt from the Tanigawa mountain range, is Japan’s most popular whitewater rafting destination — its Class III-IV rapids in spring (April-June) are thrillingly punchy, while summer offers gentler family-friendly runs through emerald green canyons. Numerous outdoor companies (Canyons, Jug Sports, etc.) offer half-day trips for about ¥6,000–9,500 with all gear, dry suits or wetsuits, transportation, and English-speaking guides. Beyond rafting, Minakami is Japan’s top adventure-sports town with canyoning, bungee jumping (a 42-meter bridge jump), and hot-air ballooning. Recover afterward in Minakami Onsen with stunning mountain views. About 1.5–2 hours from Tokyo (Joetsu Shinkansen ~70 min to Jomo-Kogen, then bus).

Adventure Apr–Oct ¥6,000–9,500
Oze National Park

Oze National Park

尾瀬国立公園

Straddling Gunma, Fukushima, Niigata, and Tochigi, Oze National Park preserves Japan’s most pristine highland marshland — a vast expanse of wooden boardwalks crossing pure wetlands rich in seasonal blooms. Gunma’s main entry point is Hatomachi-toge, reached via Tokura (from Numata) by shuttle bus since private cars are restricted, leading to the iconic Ozegahara marsh. Late May / early June brings the white skunk cabbage (mizubasho) blanketing the wetlands; July features bright orange day lilies; late September to early October paints the silver grasslands gold. The 17-km loop trail can be done in a long day, or stretched over 2 days at the historic mountain huts. Vehicle access is restricted to preserve the ecosystem — visitors hike from designated parking lots. Best from late May through October.

Alpine May–Oct Free

Insider Tips

現地通の旅の裏ワザ

♨️ Kusatsu vs Ikaho Logic

Kusatsu has more dramatic yubatake but is 3–4 hours from Tokyo. Ikaho (2 hours) has the iconic stone steps and is doable as a day trip.

草津は湯畑が圧巻だが東京から3〜4時間。伊香保(2時間)は石段街が日帰り可能で時間効率◎。

🥬 Konjac Park

Gunma produces 90% of Japan’s konjac. Kanra’s ‘Konjac Park’ offers free entry plus a hands-on making class (from ¥1,100) — very few foreign tourists know.

群馬はこんにゃく日本一(90%)。甘楽町「こんにゃくパーク」は入場無料、手作り体験は¥1,100〜(小学生¥550〜)。海外客にほぼ未知の穴場。

Frequently Asked Questions

What is the yumomi ceremony at Kusatsu?

Yumomi is the traditional practice of cooling Kusatsu’s scalding spring water (about 50–55°C) by stirring it with long wooden paddles, accompanied by folk songs. Paid shows (adults ¥700) run several times daily at the Netsu-no-yu bathhouse.

湯もみは約50〜55℃の激熱の源泉を木の板でかき混ぜて冷ます伝統。熱乃湯で毎日有料(大人¥700)の実演を見られます。

Can I visit Tomioka Silk Mill as a day trip from Tokyo?

Yes — JR Joetsu Shinkansen to Takasaki (50 min from Tokyo), then the Joshin Dentetsu line to Joshu-Tomioka (~40 min), then a 10-min walk. Allow 2–3 hours at the mill itself.

東京〜高崎は新幹線で約50分、上信電鉄・上州富岡駅から徒歩約10分(高崎から約40分)。見学は2〜3時間確保を。

What makes Kusatsu Onsen special?

Kusatsu’s spring water is among the most acidic (pH ~2.0) of any major Japanese onsen, giving it extraordinary bactericidal properties. It’s said to cure ‘all ailments except lovesickness’ (恋の病以外).

草津の温泉は日本屈指の酸性(pH2.0)で強力な殺菌作用があります。『万病に効く』と言われ、恋の病以外は治ると伝わります。

Travel Tip

At Kusatsu, use the free ‘Yukemuri-tei’ footbath on the Yubatake for a no-cost introduction to the famous spring water. Then buy an ¥800 ‘Sai-no-Kawara Rotenburo’ outdoor bath ticket for a stunning open-air soak with mountain views.

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