[Japan Water Agency / JWA] Water resources development of seven river systems.

[Japan Water Agency / JWA] Water resources development of seven river systems.

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Dams, Canals Kanto Area

Gunma Canal

Tourist Spots
By BusBy TrainBy Car
1. Irrigational water
Max. intake: approx. 12m³/s (Benefited land: approx. 6,300ha)
2. Domestic water
Max. intake: approx. 4m³/s (Supply water to 8 cities that have the population of approx. 1million)
Benefited Area
Gunma Pref.
Maebashi City, Takasaki City, Shibukawa City, Kiryu City, Yoshioka Town, Shinto Village, Isesaki City, and Tamamura Town
Facilities Water Intake Works (Two Roller Gates, max. intake amount approx. 17m³/s) Main canal (approx. 4.0km), Sekishin Diversion Works, Ramp (approx. 7.8km), Preliminary Intake Works (2 Roller gates, max. water intake amount 11.67m³/s),Channel (approx. 1.6km), Pumping Facility (6 facilities, water conveyance pipe: approx 10.2km), Primary canal (Akagi Primary Canal: approx. 32.0km, Haruna Primary Canal: approx. 16.4km) Lateral canals (8 canals: approx. 20.6km), Solar power generation facility: 3 places.
Completion 1969
Details Water source areas of Gunma Canal are Yagisawa Dam and Naramata Dam, and its canal water is used for irrigation for the farmland of approx. 6,300ha on the hillside of Mt. Akagi and Mt. Haruna and also for domestic water for 7 municipalities such as Maebashi City. Canal management started in April 1970 and the above domestic water supply started in 1982. Canal water is taken at the right bank of Tone River at Iwamoto District of Numata City with max. water intake of 16.734m³/s, then after running for approx. 4km at Sekishin Diversion Works, the water is divided into Akagi Main Canal and Haruna Main Canal, then via respective sluices, and pumping stations, the water is delivered.


Maebashi City, Gunma Pref.
Phone No.
Fax No.
*Gunma Canal Operation and Maintenance Office


Approx.15 min. by walking from Shin-Maebashi sta. of JR Joetsu Line, JR Ryomo Line and JR Agatsuma Line

Tourist Spots

Mt. Akagi
Mt. AkagiGunma Canal is flowing at the southern foot of Mt. Akagi. Mt. Akagi is actually the mountain ranges with Mt. Kurobi as the highest peak. Close to the top, there is a lake named Onuma (literally "Large Pond"). Along this lake on the hillside of the surrounding mountains there is a large community of azaleas, which attract visitors and hikers with their beautiful red and pink colored blossoms in early June and red-colored autumn leaves in October. As there are many trekking trails in this mountain resort area, one day downhill trekking will be agreat fun for your family as the Lake area is easily connected with a convenient road from Maebashi, Capital city of Gunma Prefecture.
Mt. Harua and Ikaho Hot Springs
Mt. Harua and Ikaho Hot SpringsGunma Canal, after diverting, runs from north to south along the foot of Mt. Haruna. Mt. Haruna presents beautiful Haruna Lake and Haruna-Fuji (Crator Cone) connected with a ropeway to its top. The view from the top of the crator cone is spectacular. And on the hillside of the mountain is a famous mountain hot spring resort named Ikaho-Onsen. This hot spring resort is well known among hot-spring goers because of enjoyable stroll on the stairways with lots of small amusement houses on both sides and hot spring bath house on the way. There are many traditional Japanese style hot spring inns and contemporary hotels in this resort.
Photo by "Shibukawa Ikaho Spa and Resort Tourism Association" HP
See more ->Shibukawa Ikaho Spa and Resort Tourism Association
Mizusawa Kannon Temple
Mizusawa Kannon TempleOn the foot of Mt. Haruna is Mizusawa Kannon temple, which has the history of over 1000 years. The temple holds many traditional wooden structures, including the large entrance gate, the main hall, the bell tower, and the hexagonal two-storied pagoda. Those are mostly designated important cultural properties. In addition, what makes this temple famous is "Mizusawa Udon", local noodle soup, made from the locally-made wheat. So have fun eating noodle soup at one of the local noodle restaurant and soaking yourself into a hot spring bath and satisfy your appetite and relaxation desire.
Photo by "Shibukawa Ikaho Spa and Resort Tourism Association" HP
See more ->Shibukawa Ikaho Spa and Resort Tourism Association


Gunma Water Fair [End of July]
This gunma Water Fair is held at Gunma Children's Museum, Part of Kanayama Children's Park in Ota City, Gunma Prefecture. As it is important to learn the preciousness of water used for our daily life and for industrial activities, including water power generation, and the use of natural water resources and it is further important for even a young children to start learning the roles of water resources, such a fair provides education opportunities through hands-on experiences, including quizes, games, and the models, etc.
Maebashi First Market Festival [Beginning of January]
One of the three major festivals of Maebashi is Maebashi First Market Festival. Back in the old days, the market was held twice a month, i.e.on the 4th an 9th of the month, holding the sales of the commodities and raw silk. This opening market tradition started at the time of Shigetada Sakai, then feudal lord. Nowadays the market is centered on the sale of Daruma dolls, which become the seasonal tradition of Maebashi City in winter.
Photo by "Gunma City" HP
See more ->Gunma City

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