Semboku (仙北市, Semboku-shi) is a city located in Akita Prefecture, Japan. As of 31 December 2019, the city had an estimated population of 25,857 in 10,584 households,[1] and a population density of 24 persons per km². The total area of the city is 1,093.64 square kilometres (422 sq mi).


Semboku City Hall
Semboku City Hall
Flag of Semboku
Official seal of Semboku
Location of Semboku in Akita Prefecture
Location of Semboku in Akita Prefecture
Semboku is located in Japan
Coordinates: 39°42′06″N 140°43′53.4″E / 39.70167°N 140.731500°E / 39.70167; 140.731500Coordinates: 39°42′06″N 140°43′53.4″E / 39.70167°N 140.731500°E / 39.70167; 140.731500
 • Total1,093.64 km2 (422.26 sq mi)
 (December 2019)
 • Total25,857
 • Density24/km2 (61/sq mi)
Time zoneUTC+9 (Japan Standard Time)
Phone number0187-43-1111
Address30 Miyanoshiro, Obonai, Tazawako, Semboku-shi, Akita-ken 014-1201
WebsiteOfficial website


Semboku is located in the mountains of central Akita Prefecture, bordering on Iwate Prefecture and the Ōu Mountains on the east. Lake Tazawa, the deepest lake in Japan, is located in the center of the city borders. Parts of the city are within the borders of the Towada-Hachimantai National Park.

Neighboring municipalitiesEdit


Per Japanese census data,[2] the population of Semboku peaked in the early 1960s, and has since declined to the same level as a century ago.

1920 29,123—    
1930 32,017+9.9%
1940 37,453+17.0%
1950 43,358+15.8%
1960 43,765+0.9%
1970 39,216−10.4%
1980 39,098−0.3%
1990 36,297−7.2%
2000 33,565−7.5%
2010 29,572−11.9%


Semboku has a Humid continental climate (Köppen climate classification Dfa) with large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. Precipitation is significant throughout the year, but is heaviest from August to October. The average annual temperature in Semboku is 9.8 °C. The average annual rainfall is 1539 mm with September as the wettest month. The temperatures are highest on average in August, at around 24.0 °C, and lowest in January, at around -3.2 °C.[3]


The area of present-day Semboku was part of ancient Dewa Province. During the Edo period, the area came under the control of the Satake clan, who had been relocated to Kubota Domain from their former holdings in Hitachi Province. After the start of the Meiji period, the area became part of Semboku District, Akita Prefecture in 1878. The town of Kakunodate was established on Aprl 1, 1889 with the establishment of the modern municipalities system.

The city of Semboku was established on March 22, 2005, from the merger of the towns of Kakunodate and Tazawako, and the village of Nishiki (all from Semboku District).


Semboku has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 18 members. The city contributes one member to the Akita Prefectural Assembly. In terms of national politics, the city is part of Akita District 3 of the lower house of the Diet of Japan.


The economy of Semboku is based on agriculture, forestry and seasonal tourism.


Semboku has seven public elementary schools and five public middle schools operated by the city government and one public high school operated by the Akita Prefectural Board of Education.



  East Japan Railway Company - Akita Shinkansen

  East Japan Railway Company - Tazawako Line

Akita Nairiku Jūkan Railway - Akita Nairiku Line


Local attractionsEdit

International relationsEdit

Twin towns — Sister citiesEdit

Semboku is twinned with:

Noted people from SembokuEdit


External linksEdit