Itoigawa City

Niigata Prefecture · City

Official website Niigata Prefecture page

Itoigawa City is at the western end of the prefecture, facing the Sea of Japan, and the Itoigawa-Shizuoka Tectonic Line passes through it. It is one of the world's major sources of jade, and the whole city is a UNESCO Global Geopark. Sights include Oyashirazu, cliffs known as a dangerous spot on the old Hokurikudo road, and Fossa Magna Park.

Key facts

Population: 36,519 646th in Japan2025 Census
5-year change: −10.4% 429th in Japanfrom 40,765 in 2020
Area: 746 km² 85th in Japan
Population density: 49 people/km² 1,287th 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.

Live information

Current weather (observed)

Places to visit

Chosen automatically, most popular first, from landmarks and cultural properties registered in Wikidata (we have not checked whether each is open). Names and descriptions: Wikidata (CC0); photos: Wikimedia Commons (photographer and license under each photo).

Mountains in this city

Mountains whose summit is in this municipality (mountains of 800 m or higher on this site's map, and mountains in the famous-mountain lists). Elevations from Wikidata and other sources.

National parks in this city

Myoko-Togakushi renzan National ParkTotal park area 398 km²Spans Niigata, Nagano
Chubusangaku National ParkTotal park area 1,743 km²Spans Niigata, Toyama, Nagano, Gifu

Chosen by overlaying the park boundaries (Ministry of the Environment, Biodiversity Center of Japan, "National Park Areas" GIS data, updated April 28, 2025, combined and simplified by NIPPON ATLAS) with municipal boundaries (National Land Numerical Information, January 2021), keeping overlaps of about 0.5 km² or more (approximate). Areas are the land areas from the Ministry of the Environment, "Overview of National Parks" (April 10, 2026). All national parks

Neighboring municipalities

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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