Suo-oshima Town

Yamaguchi Prefecture · Town

Official website Yamaguchi Prefecture page

Suo-oshima Town consists of Suo-Oshima (Yashiro Island) and other islands in the Seto Inland Sea, linked to Yanai City by Oshima Bridge. The warm climate supports mandarin orange growing. From the Meiji era, many residents emigrated to Hawaii, and the Museum of Japanese Emigration to Hawaii is here. Folklorist Miyamoto Tsuneichi was born in the town.

Key facts

Population: 12,838 1,076th in Japan2025 Census
5-year change: −13.2% 168th in Japanfrom 14,798 in 2020
Area: 138 km² 803rd in Japan
Population density: 93 people/km² 1,076th 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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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 town

Mt. Kano685 m

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 town

Setonaikai National ParkTotal park area 673 km²Spans Hyogo, Wakayama, Okayama, Hiroshima, Yamaguchi, Tokushima, Kagawa, Ehime, Oita

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

Other municipalities in Yamaguchi Prefecture

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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