Gumma
Gumma is a STATE in Japan, Asia.
Gunma Prefecture, nestled in the heart of Japan's main island of Honshu, is a captivating destination where dramatic natural landscapes meet rich cultural traditions. Often called the 'Roof of Kanto' due to its mountainous terrain, Gunma is famous for its world-class onsen (hot springs), particularly in Kusatsu, where steaming thermal waters bubble up in the town center. Outdoor enthusiasts flock to Minakami for thrilling white-water rafting, canyoning, and bungee jumping, while winter transforms the region into a premier skiing and snowboarding destination at resorts like Tanigawadake Tenjindaira. History buffs can explore the UNESCO World Heritage Tomioka Silk Mill, a testament to Japan's industrial revolution, and the historic Ikaho Stone Steps lined with traditional shops. The prefecture is also renowned for its agricultural bounty, producing succulent fruits and the prized 'Gunma Wagyu' beef. With majestic peaks like Mount Akagi and Mount Haruna framing serene lakes, Gunma offers a perfect blend of adventure, relaxation, and cultural immersion away from the urban crowds.
Best time to visit Gumma
April to May for pleasant spring weather and cherry blossoms; October to November for stunning autumn foliage in the mountains. December to March for skiing and snowboarding, with peak conditions in January-February. July-August is hot and humid but ideal for mountain escapes and festivals like the Tanabata celebrations. Avoid late June to early July (rainy season) for outdoor activities.
October
NowTypical for October
- Weather
- Mild 12-20°C, autumn colors
Travel notes
- Crowds
- High
- Prices
- Peak
Best for foliage
Know before you go
Getting there
Narita International Airport
International
150 km away
Tokyo Haneda Airport
International
120 km away
Takasaki Airport
Domestic
10 km away
Getting around
Stay connected
WiFi speed
30 Mbps
Mobile data
Excellent
WiFi
Widely available in cities and many onsen resorts
Local SIM
Local SIM available at major airports from $10
Calling code
+81
Stay safe
Overall
9/10Very safe region. Scams are extremely rare.
Night safety
8/10Very safe region. Scams are extremely rare.
Transport
9/10Scam risk
2/10Entry and health
Health information
Culture
Local customs
Costs and practicals
Currency
Cost level
Meals
Hotels
Local transport
Cost notes
Timezone
More facts
Population
1,900,000
Area
6,362 km²
Government
Prefectural government with a governor and elected assembly
ISO code
10
Type
Prefecture
Frequently Asked Questions
Also known as: 群馬総社, Gunma-Sōja, 군마소자, Gumma-Sōja, Tomioka, Tomioka-chhi, Tomioka-chhī, domioka si, fu gang, fu gang shi, twmywka, Томиока, Томіока, توميوكا, تومیاوکا، گونما, 富岡, 富岡市, 도미오카 시



