Demographics
Per Japanese census data, the population of Nagai has declined over the past 70 years.
History
The area of present-day Nagai was part of Dewa Province and was part of the holdings of Yonezawa Domain under the Edo period Tokugawa shogunate. The village of Nagai was created within Nishiokitama District, Yamagata with the establishment of the modern municipalities system on April 1, 1889. Nagai merged with the neighboring villages of Toyoda, Hirano, Nishine and Isazawa on November 15, 1954, to form the city of Nagai.
Government
Nagai has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 16 members. The city contributes two members to the Yamagata Prefectural Assembly shared with Nishiokitama District. In terms of national politics, the city is part of Yamagata District 2 of the lower house of the Diet of Japan.
Economy
The economy of Nagai is based on agriculture and light manufacturing of electronic and robotic components and pharmaceuticals.
Education
Nagai has six public elementary schools and two public middle schools operated by the city government and two public high schools operated by the Yamagata Prefectural Board of Education.
Transportation
Railway
20px East Japan Railway Company - Yonesaka Line
16 px Yamagata Railway Company - Flower Nagai Line
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Highways
International relations
Hometown of
- United Republic of Tanzania, since August, 2025
Sister cities
- Bad Säckingen, Waldshut, Baden-Württemberg, Germany, since May 8, 1983
- Shuangyashan, Heilongjiang, China,