Nakagawa is located in the Ina Valley of south-central Nagano Prefecture in the Kiso Mountains. The Tenryū River flows through the village. The Koshibu Dam is located in Nakagawa.
The village has a climate characterized by characterized by hot and humid summers, and cold winters (Köppen climate classificationCfa). The average annual temperature in Nakagawa is 9.7 °C. The average annual rainfall is 1691 mm with September as the wettest month. The temperatures are highest on average in August, at around 22.25 °C, and lowest in January, at around -2.4 °C.[3]
Demographics
Per Japanese census data,[4] the population of Nakagawa has been declining over the past 70 years.
Historical population
Year
Pop.
±%
1940
8,384
—
1950
9,327
+11.2%
1960
7,751
−16.9%
1970
5,816
−25.0%
1980
5,524
−5.0%
1990
5,518
−0.1%
2000
5,475
−0.8%
2010
5,074
−7.3%
2020
4,651
−8.3%
History
The area of present-day Nakagawa was part of ancient Shinano Province. The villages of Katagiri and Minakata merged on August 1, 1959 to form the village of Nakagawa.
Education
The village has two public elementary schools and one public junior high school operated by the village government. The village does not have a high school.
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