Kaisei Town

Kanagawa Prefecture · Town

Official website Kanagawa Prefecture page

Kaisei Town has the smallest area of any town in Kanagawa Prefecture and is known as a village of hydrangeas. The view of the town's rice paddies and hydrangeas is a feature of early summer.

Key facts

Population: 18,582 919th in Japan2025 Census
5-year change: +1.4% 95th in Japanfrom 18,329 in 2020
Area: 6.55 km² 1,720th in Japan
Population density: 2,837 people/km² 171st in Japan

Source: Statistics Bureau of Japan, 2025 Population Census (population, area and density); area from the Geospatial Information Authority of Japan (GSI), Area Statistics of Prefectures and Municipalities (2025). National ranks are among the 1,741 municipalities, ordered by this site from these values.

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Municipalities sharing a boundary (computed from the National Land Numerical Information administrative boundaries, January 2021).

The description was written for this site, picking out representative features.

Figures come from official Japanese statistics (such as the 2025 Census by the Statistics Bureau of Japan), with the source and year shown next to each one. Photos are freely licensed images from Wikimedia Commons; the photographer and license are shown under each photo.

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