Gunma Prefecture
Trademark
UnclaimedGunma Prefecture is an inland prefecture in Japan's Kantō region, known for mountain landscapes, hot-spring resorts, manufacturing, agriculture, and the promotional character Gunma-chan.
Last updated August 24, 2026
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Overview
Gunma Prefecture is an inland administrative region of Japan located in the northwestern part of the Kantō region on Honshu. Its capital is Maebashi, while Takasaki is the prefecture's largest city and an important transportation and commercial center. Other major urban areas include Ōta, Isesaki, and Kiryū. Gunma covers approximately 6,362 square kilometres and is bordered by Niigata and Fukushima to the north, Tochigi to the east, Saitama to the south, and Nagano to the west. The prefecture is one of Japan's eight landlocked prefectures and combines a densely settled southeastern plain with extensive mountain districts in the north and west. The regional identity of Gunma is strongly shaped by its terrain and climate. Mounts Akagi, Haruna, Myōgi, Nikkō-Shirane, and Asama are among its best-known peaks, while the Tone, Agatsuma, and Karasu rivers support settlements, agriculture, and transport corridors. Mountain barriers produce the dry winter karakkaze wind in the plain, while the uplands receive heavy snowfall and support ski areas. Natural parks account for a significant share of the prefecture, including parts of Jōshin'etsu-kōgen, Nikkō, and Oze national parks, as well as the Myōgi-Arafune-Saku Kōgen quasi-national park. Gunma's historical identity reaches back to the ancient Kozuke or Kōzuke province, also called Jōmō. The area became an important center of horse breeding and horse trading after the arrival of continental migrants and associated technologies. Archaeological evidence, including sites buried by volcanic ash from Mount Haruna, illustrates the region's early settlement history. The Tenmei eruption of Mount Asama in 1783 caused extensive destruction and remains one of the major natural disasters associated with the region's past. During the Meiji period, Gunma became one of Japan's most important silk-producing areas. Modern silk factories were established in the 1870s with technical assistance from Italy and France, connecting local sericulture to international industrial networks. The prefecture also experienced political conflict during the Gunma Incident of 1884, when democratic and liberal activists clashed with government forces. In the twentieth century, the region developed major transport-equipment and electrical industries. Ōta became particularly associated with aircraft and automobile manufacturing through the historical Nakajima Aircraft Company and its industrial successor, now linked to Subaru production. The contemporary prefectural economy combines manufacturing, agriculture, tourism, education, and services. Transport equipment and electrical equipment remain prominent, especially around Maebashi and eastern Gunma. Ōta is widely associated with automobile production, while traditional industries include sericulture. Gunma is a leading producer of konnyaku and cabbage; the prefecture supplies most of Japan's konnyaku production, and Tsumagoi is especially known for cabbage farming. Tourism is centered on hot springs, mountains, cultural sites, and food. Kusatsu Onsen is the best-known resort, joined by Ikaho and other hot-spring destinations. Skiing, hiking, waterfalls, volcanic landscapes, museums, and historic temples broaden the visitor offer. Local foods include yaki-manju, okkirikomi, and konnyaku-based dishes. Gunma also promotes its identity through Jōmō Karuta, a regional card game featuring local people, places, and cultural references, and through Gunma-chan, a horse-themed character used by the prefectural government in public communication and tourism promotion. The prefecture's image has additionally been reinforced by manga and anime settings, including Initial D and other works associated with its roads, towns, and landscapes.
History
Gunma's historical territory corresponds broadly to the ancient province of Kozuke, later known in regional usage as Jōmō. In antiquity, the area became an important center for breeding and trading horses. Archaeological evidence links the spread of horses and horse equipment to migration from the Asian continent, and the animals soon became important to Japanese military organization. The region's volcanic environment has also preserved evidence of early communities: an eruption of Mount Haruna in the late sixth century buried settlement and animal remains, allowing later archaeological work to date the event and reconstruct aspects of local life. Gunma remained connected to the wider political history of eastern Japan through the medieval and early modern periods. The former Kenu Province was divided into Kami-tsu-ke, corresponding broadly to Gunma, and Shimo-tsu-ke, corresponding broadly to Tochigi. During the Tokugawa period, the territory was associated with loyalist or fudai interests and was sometimes described by Western observers as the Jōshū States. Tokugawa symbols appeared widely on public and religious buildings. The 1783 Tenmei eruption of Mount Asama caused severe loss and disruption across the surrounding region and became a defining event in the history of northern Kantō. Gunma's transformation into a modern industrial region accelerated after the Meiji Restoration. Sericulture and silk manufacture became especially important. Factories established at Annaka in the 1870s drew on Italian and French technical assistance and connected local producers to international markets. Silk production helped finance modernization and shaped the social and economic structure of many communities. At the same time, political tensions were acute. The Gunma Incident of 1884 involved a violent confrontation between liberal and democratic activists and forces representing the increasingly centralized state. The episode reflected broader conflicts over political rights, industrial change, and the form of Japan's modern government. During the twentieth century, Gunma acquired a new industrial profile through aviation and transport equipment. Nakajima Aircraft Company, founded by aviation pioneer Nakajima Chikushi in Ōta, initially produced licensed foreign designs but later developed indigenous aircraft, including the Nakajima Type 91 fighter. The company became a major force in Japanese aeronautical engineering. After the Second World War, the industrial base was transformed and ultimately became associated with Subaru automobile production and other manufacturing under the corporate lineage of Fuji Heavy Industries. Gunma also participated in Japan's cultural and architectural exchanges with Europe. German architect Bruno Julius Florian Taut lived and conducted research in Takasaki during the 1930s. In the postwar period, the prefecture entered international news through the 1957 Girard incident at Sōmagahara near Shibukawa, an event that affected United States–Japan relations. Gunma has also produced four Japanese prime ministers: Takeo Fukuda, Yasuhiro Nakasone, Keizō Obuchi, and Yasuo Fukuda, the son of Takeo Fukuda. In the contemporary period, Gunma has maintained a mixed economic identity. Manufacturing, particularly automobiles and electrical equipment, is concentrated in and around the eastern plain and areas with strong links to Tokyo. Agriculture remains important, with cabbage and konnyaku as signature products and sericulture continuing as part of the region's heritage. The mountain districts support hot-spring resorts, skiing, hiking, and nature tourism. Public promotion emphasizes the prefecture's landscape, food, history, and distinctive local culture through devices such as Gunma-chan and Jōmō Karuta. Roads, railways, and expressways connect the inland prefecture with Tokyo and neighboring regions, while popular media has further familiarized audiences with Gunma's mountain roads and communities.
- 2025
Extreme heat in Isesaki
[1]Isesaki was reported in the reference material to have recorded 41.8 degrees Celsius on 5 August 2025, described as Japan's highest recorded temperature.
- 2018
Expansion of Gunma's melody-road network
[1]Gunma was reported to have eleven melody roads, where grooves in road surfaces create musical vibrations through vehicle wheels.
- 2004
Closure of Takasaki horse-racing track
[1]The closing of the last horse-racing track in Takasaki ended Gunma's distinction as the only Japanese prefecture to have hosted all four legal race-gambling categories.
- 1957
Girard incident
[1]The Girard incident occurred at Sōmagahara Base near Shibukawa and became a point of tension in United States–Japan relations.
- 1931
Nakajima develops the Type 91 fighter
[1]The Nakajima Aircraft Company developed the all-Japanese Nakajima Type 91 fighter, illustrating the growth of Gunma's aviation industry.
- 1884
Gunma Incident
[1]A violent political confrontation involving liberal activists, local farmers, and state forces took place in Gunma and neighboring Nagano.
- 1870
Modern silk manufacturing begins
[1]Modern silk factories were established at Annaka during the 1870s with Italian and French technical assistance.
- 1783
Mount Asama's Tenmei eruption
[1]A major eruption of Mount Asama caused extensive damage in the region and became one of Gunma's most significant historical disasters.
Kozuke and Jōmō regional identity
[1]The territory is historically associated with the ancient province of Kozuke and the later regional name Jōmō.
Products and positioning
A mountainous, manufacturing-oriented and culturally distinctive Japanese prefecture that combines inland nature, hot-spring tourism, agricultural specialties, and industrial heritage.
Agricultural and food products
Konnyaku products
Gunma is Japan's leading konnyaku-producing region and is reported to account for more than 90 percent of national production. Konnyaku is used in traditional foods and is also presented through tourism and educational attractions such as Konnyaku Park.
Agricultural products
Cabbage
Cabbage is a major Gunma agricultural product, especially in Tsumagoi, where cabbage farming occupies a large share of agricultural land. The crop is part of the prefecture's food identity and regional economy.
Traditional industry
Silk and sericulture
Sericulture and silk manufacture were central to Gunma's modernization, particularly from the Meiji period onward. Although the economy has diversified, silk remains an important element of the prefecture's industrial heritage and cultural storytelling.
Manufacturing
Automobiles and transport equipment
Gunma has a substantial transport-equipment industry. Ōta is especially associated with Subaru automobile production and the industrial legacy of the Nakajima Aircraft Company, while related manufacturing is distributed across the prefecture's eastern and central areas.
Tourism
Hot-spring tourism
Gunma's hot-spring economy includes the internationally recognizable Kusatsu Onsen as well as Ikaho and other resort areas. These destinations combine bathing culture with mountain scenery, accommodation, food, and seasonal recreation.
Regional promotional character
Gunma-chan
Gunma-chan is a small horse-themed character used by the prefectural government in promotional posters, banners, printed materials, and tourism communications. The character reflects the region's historical association with horses and functions as a recognizable public-facing symbol.
Controversies
1957
Girard incident
The Girard incident at Sōmagahara Base near Shibukawa disturbed United States–Japan relations in the 1950s and became one of the best-known postwar international incidents associated with Gunma.
1884
Gunma Incident
The Gunma Incident was a violent political conflict involving democratic Westernizers, conservative nationalists, farmers, and the modern Japanese state. It reflected tensions surrounding political reform and the consolidation of Meiji government authority.
Marketing campaigns
- 2018Gunma melody roads
Domestic tourism
Grooves cut into selected roads create musical vibrations when vehicles travel over them at appropriate speeds. Gunma's network includes roads in several towns and cities, each associated with a different tune.
Outcome. The roads became a distinctive experiential tourism feature linking transport infrastructure with local entertainment.
- Gunma-chan prefectural promotion
Japan · International tourism audiences
The prefectural government uses Gunma-chan and related horse imagery across public promotional materials, signage, tourism communications, and regional branding.
Outcome. Gunma-chan provides a consistent, approachable visual identity for the prefecture's public and tourism promotion.
- Jōmō Karuta cultural promotion
Gunma Prefecture · Japan
Jōmō Karuta is a regional card game featuring people, locations, and cultural subjects associated with Gunma. It functions as both a traditional game and a mechanism for teaching and reinforcing local identity.
Outcome. The game remains a distinctive cultural symbol and educational vehicle for regional heritage.
Brand decisions
2004
End of horse-racing operations at TakasakiOtherBackground
Takasaki's horse-racing track was the last of Gunma's horse-racing facilities.
Action taken
The track closed in 2004.
Aftermath
Gunma no longer had all four legal race-gambling categories operating within the prefecture.
- Promote Gunma through tourism, food, and regional symbolsStrategy
Background
Gunma combines a mountainous landscape, hot-spring resorts, agricultural specialties, manufacturing, and a distinctive cultural history.
Action taken
The prefectural government and related organizations promote destinations such as Kusatsu Onsen, local foods, natural parks, melody roads, Jōmō Karuta, and Gunma-chan.
Aftermath
These elements form a broad regional identity aimed at domestic visitors, residents, businesses, and international tourism audiences.
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