Ibara City

Okayama Prefecture · City

Official website Okayama Prefecture page

Ibara City in southwestern Okayama Prefecture borders Hiroshima Prefecture and is known for denim fabric. The former Bisei Town, a "village of stars," passed Japan's first light pollution ordinance and has the Bisei Astronomical Observatory. The city is said to be the birthplace of the "Chugoku Region Lullaby" and has the Hanatori Otsuka Art Museum.

Key facts

Population: 35,310 657th in Japan2025 Census
5-year change: −8.0% 737th in Japanfrom 38,384 in 2020
Area: 244 km² 501st in Japan
Population density: 145 people/km² 935th 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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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).

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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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