Karuizawa Population 2026
Karuizawa has a population of 20,023, making it the #1063 biggest city in 🇯🇵 Japan, located in Nagano. It is about 486× smaller than Tokyo, the country's biggest city.
Population (city proper)
20,023
Rank in Japan
#1063
Coordinates
36.35°N, 138.63°E
~952 m elevation · Asia/Tokyo
Distance to capital (Tokyo)
120 km
75 miles, straight line
Other big cities in Nagano
Cities near Karuizawa
FAQ
What is the population of Karuizawa?
Karuizawa has a population of 20,023 (city proper, latest official figure via GeoNames), making it the #1063 biggest city in Japan.
What region is Karuizawa in?
Karuizawa is located in Nagano, Japan.
Is Karuizawa the capital of Japan?
No, the capital of Japan is Tokyo, about 120 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.