📅 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: JR Agatsuma Line from Tokyo (Shinkansen to Takasaki, then local, 2.5 hr to Kusatsu); or highway bus from Tokyo (3 hr)
🗣️ Language: Japanese / 日本語
💴 Currency: ¥ JPY

Gunma Prefecture is Japan’s landlocked hot-spring heartland, sending more spring water to the surface than any other prefecture. Kusatsu Onsen — where the yumomi ceremony of paddling hot water with wooden boards has been performed for centuries — is considered Japan’s finest hot spring alongside Arima and Nozawa. Ikaho Onsen’s 365-step stone staircase is one of Japan’s most atmospheric onsen approaches. The Tomioka Silk Mill is a UNESCO World Heritage site marking Japan’s Industrial Revolution.

日本三名泉のひとつ・草津温泉と湯もみの伝統、365段の石段が続く伊香保温泉、世界遺産・富岡製糸場、水上の激流ラフティング——群馬は関東に隠れた名湯と歴史の宝庫。

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 Hara-shoten (Maebashi, est. 1887) and Tokumitsu (Takasaki), where lines form regardless of weather. Most shops sell take-home raw skewers (¥600-800 for 4 buns) 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 ¥200–350 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-Chigiraya (the oldest, founded 1814) and Mafuku 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 7 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 has been used by major Japanese fashion houses and even European luxury brands.

Textile ¥2,000–15,000 UNESCO Heritage 📅 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 Hisaiya 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. Hisaiya’s main store on the famous Ikaho stone-step street still hand-makes them daily. Boxed assortments of 6, 12, or 24 are sold at the shop and JR Shibukawa Station.

Manju ¥100–150 Ikaho 📅 Best within 7 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 consistently ranked #1 in Japan’s annual onsen quality polls — its waters are extraordinarily acidic and sulfur-rich, with antibacterial properties so strong they can kill many pathogens within seconds. 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 the largest open-air hot-spring bath in Eastern Japan. 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 wrote his masterpiece “Hototogisu” here. Combine with nearby Mount Haruna and Lake Haruna for a perfect Gunma weekend. From JR Shibukawa Station, buses run every 30 minutes (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, designed by French engineer 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. Hour-long guided tours bring the past to life. From JR Joshu-Tomioka Station, a 15-minute walk. Closed Wednesdays.

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, RaftingMinakami, etc.) offer half-day trips for ¥7,000-10,000 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 (highest in Japan at 42 meters), and hot-air ballooning. Recover afterward in Minakami Onsen with stunning mountain views. About 75 minutes from Tokyo by JR Joetsu Shinkansen + bus.

Adventure Jun–Oct ¥5,000–7,000
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, accessible from Numata City, 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; 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 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. Shimonita’s ‘Konjac Park’ offers free entry plus ¥500 making class — very few foreign tourists know.

群馬はこんにゃく日本一(90%)。下仁田「こんにゃくパーク」は入場無料、¥500で手作り体験。海外客にほぼ未知の穴場。

📱 Travel Essentials in Japan

日本旅行の必需品・予約サービス

📡 eSIM (Recommended)

Skip airport queues — install before you fly. Works in 192+ countries.

空港の列回避、出発前にインストール完了。世界192カ国対応。

✈️ Activate Before Takeoff →

📶 Pocket WiFi (For Groups)

Sharing with family or a group? Next-day delivery, postbox return. Or try NETAGE →

グループ利用に最適。最短翌日配送、ポスト返却OK。1日¥450〜。 またはNETAGEも比較 →

📶 Share WiFi from ¥450/day →

🎟️ Activities & Experiences

Tea ceremony, kimono, snorkeling and more. Compare and book.

茶道・着物・体験予約はたびらいで価格比較。

🎟 Compare & Book Now →

🏨 Where to Stay in Gunma

Find the perfect hotel or ryokan for your Gunma trip on Rakuten Travel.

群馬のホテル・旅館予約は楽天トラベルで。豊富なポイント還元あり。

🏨 Find Your Ryokan →

🎟 Book Activities & Experiences

アクティビティ・体験を事前予約 — 訪日客に人気のKlookで

🇯🇵 Klook — Japan Activities

The most-used activity-booking platform among inbound visitors to Japan. Browse popular destinations like Tokyo, Kyoto, Osaka, and Sapporo.

訪日客に最も利用されているアクティビティ予約プラットフォーム。東京・京都・大阪・札幌など人気観光都市をブラウズできます。

  • 🎢 Theme parks (USJ, Tokyo Disney)
  • 🗼 Landmarks (Skytree, Mt. Fuji tours)
  • 📶 Pocket WiFi & SIM rental
  • 🍣 Cultural experiences
🇯🇵 Browse Japan Activities →

🚄 Shinkansen Tickets — Japan's Bullet Trains

Book Shinkansen (bullet train) tickets in advance: Tokyo–Osaka, Tokyo–Kyoto, and more. Klook is an official partner of Japan's rail operators.

新幹線(東京〜大阪、東京〜京都など)の事前予約。Klookは日本の鉄道会社の公式パートナーです。

🚄 Book Shinkansen →

🎒 Smart Travel Gadgets for Japan

日本旅行を快適にする厳選ガジェット

🗣 Pocket Translator

Break the language barrier — Pocketalk works in 80+ languages, ideal for menus, station signs, and conversations.

ポケトークは80カ国語対応、メニュー・駅看板・会話で言語の壁を突破。

🛒 Browse on Amazon

🔋 Power Bank

Keep your phone alive all day — high-capacity power bank for navigation, photos, and translation apps.

大容量モバイルバッテリーで終日安心。地図・写真・翻訳アプリの電池切れ防止。

🛒 Browse on Amazon

🧳 Lightweight Suitcase

Japanese trains and stations have many stairs — a lightweight suitcase makes your trip 10x smoother.

日本の駅・列車は階段だらけ。軽量スーツケースで移動が10倍楽に。

🛒 Browse on Amazon

📚 Japan Travel Guide

Lonely Planet Japan & similar guides — offline insights for hidden spots, cultural etiquette, and local food.

Lonely Planet Japan等のガイド本でオフラインでも穴場・マナー・地元食情報を把握。

🛒 Browse on Amazon

Frequently Asked Questions

What is the yumomi ceremony at Kusatsu?

Yumomi is the traditional practice of cooling Kusatsu’s scalding spring water (52°C) by stirring it with long wooden paddles, accompanied by folk songs. Free demonstrations run daily at the Netsu-no-yu bathhouse.

湯もみは52℃の激熱の源泉を木の板でかき混ぜて冷ます伝統。熱の湯で毎日無料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 Joshin Dentetsu to Joshuyamaguchi, then bus (30 min total from Takasaki). Allow 2–3 hours at the mill itself.

東京〜高崎は新幹線で約50分、上信電鉄とバスで富岡製糸場まで約30分。見学は2〜3時間確保を。

What makes Kusatsu Onsen special?

Kusatsu’s spring water has the highest acidity (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 ‘Gondan Footbath’ (合わせ湯 on the Yubatake) for a no-cost introduction to the famous spring water. Then buy a ¥600 ‘Nishi-no-Kawara Rotenburo’ outdoor bath ticket for a stunning open-air soak with mountain views.

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