Tomioka (富岡市) Travel Guide & City Profile

Last reviewed: October 23, 2026 · Prices are approximate and for orientation only.

Overview & City Profile

Tomioka (富岡市, Tomioka-shi) is a city located in Gunma Prefecture, Japan. As of 1 September 2020, the city had an estimated population of 57,013 in 20,367 households, and a population density of 390 persons per km2. The total area of the city is 122.85 square kilometres (47.43 sq mi). It is the location of the Tomioka Silk Mill, a UNESCO World Heritage Site.

Within Gunma Prefecture (Kanto region), Tomioka (富岡市) serves as a city in gunma prefecture. Travelers exploring Gunma often combine a stop in Tomioka with regional highlights such as Kusatsu Onsen (famous Yubatake hot-spring field), Ikaho Onsen stone steps, Shima & Minakami Onsen, UNESCO Tomioka Silk Mill, and Takasaki's Daruma dolls.

Getting to Tomioka & Getting Around

Via the regional hub (Takasaki Station (Joetsu & Hokuriku Shinkansen)): 50m from Tokyo Station to Takasaki on the Joetsu or Hokuriku Shinkansen, connecting to local JR lines and highway buses to Kusatsu and Ikaho.

• Local rail & IC cards: Once in Gunma Prefecture, JR regional lines and local private railways connect Maebashi with Tomioka. Nationwide IC cards (Suica, Pasmo, Icoca) work on major urban and JR commuter gates; for rural branch lines or local buses, keep ¥1,000 bills and ¥100 coins handy for the onboard fare box.
• Luggage & station lockers: Main stations in Gunma have coin lockers for day-trippers. If you are stopping in Tomioka en route between larger bases, check your suitcase dimensions in our Luggage & Locker Checker or forward big bags ahead with Takkyubin.
• Driving & car rental: While city centers around Tomioka are accessible by train and taxi, renting a car from a major Shinkansen station or airport in Gunma can be rewarding for reaching mountain gorges, coastal viewpoints, and countryside onsen. Read our Renting a Car in Japan Guide.

What to Eat in Tomioka & Gunma

Tomioka shares the culinary traditions of Gunma Prefecture and the wider Kanto region. Don't miss these local specialties during your visit:

• Mizusawa udon (thick spring-water noodles) — a signature specialty across Gunma Prefecture.
• Okkirikomi (wide flat noodle stew) — a signature specialty across Gunma Prefecture.
• Yaki-manju (sweet miso-glazed steamed buns) — a signature specialty across Gunma Prefecture.
• Joshu wagyu & Tontoro pork — a signature specialty across Gunma Prefecture.
• Shimonita negi (giant leeks) — a signature specialty across Gunma Prefecture.

For dietary restrictions or food allergies, open our Japanese Phrasebook & Show-to-Staff Cards to display clear Japanese dietary explanations at restaurants in Tomioka.

Best Time to Visit & Seasonal Highlights

Year-round for hot springs; July–August for cool Oze National Park boardwalks; October for Minakami &谷川岳 (Mount Tanigawa) autumn leaves; winter for snow onsen.

Regional highlights across Gunma Prefecture that pair well with a visit to Tomioka include: Kusatsu Onsen (famous Yubatake hot-spring field), Ikaho Onsen stone steps, Shima & Minakami Onsen, UNESCO Tomioka Silk Mill, and Takasaki's Daruma dolls.

Practical Travel Tips for Tomioka

• Tourist information center (観光案内所): Look for the Kankō Annaijo counter inside or right outside the main train station in Tomioka (or at Takasaki Station (Joetsu & Hokuriku Shinkansen)) for free walking maps, bus timetables, and festival calendars.
• Cash & ATMs: While hotels, chain stores, and convenience stores in Tomioka accept international cards and IC payment, smaller family-run restaurants, shrines, and rural buses often prefer cash. 7-Eleven (Seven Bank) and Japan Post ATMs accept foreign debit cards reliably.
• Dining hours: Outside major metropolitan hubs, lunch typically runs 11:30 AM–2:00 PM and dinner spots open around 5:30 PM, with earlier last orders (around 8:00–9:00 PM) in smaller cities.