Suo-Oshima

① Climate

Reference: JMA Normals 1991–2020 / close to Yanai Station data

• Annual mean temperature: 16.5 °C
• Warmest month (avg): Aug ~28.0 °C ／ Coldest month (avg): Jan ~6.0 °C
• Humidity: Max Jul ~82% ／ Min Feb ~67%
• Annual snowfall: Little to none (0–1 cm)
• Sunshine hours: Longest around Oct–Nov
• Annual precipitation: ~1,700 mm (most: Jul ~250 mm ／ least: Jan ~60 mm)

② Landform

 One of the largest islands in the Seto Inland Sea, surrounded by a beautiful multi-island seascape.
 Topography features gentle hills and marine terraces with a warm, relatively dry climate.
 Settlements line the coast; the interior has terraced fields and orchards.
 From Mt. Kasayama, you can take in panoramic island views of the Seto Inland Sea.

③ Industry

 Key sectors include citrus (mandarin) cultivation leveraging the warm, dry climate, coastal fisheries & seafood processing, and marine-resort tourism. Beaches, campsites, and cafés support a rich visitor economy.
Local specialties

• Oshima Mikan (mandarin oranges): A signature citrus brand of Yamaguchi.
• Seto Shellfish: Bivalves from productive fishing grounds.
• Jams & Citrus Sweets: Growing sixth-sector (farm-to-processing) products.

④ Local Culture

 Island culture of the Seto Inland Sea remains vivid, together with the history of Hawaiian migration.
 Hula culture and international exchange are active—hence the “Hawaii of the Seto Inland Sea.”
 Folk arts like the “Suo-Oshima Ondo” are also preserved.

• Suo-Oshima Ondo: A traditional summer dance performed across the island.
• Akashi-sho Hachiman Kagura: A local kagura tradition with Seto-style court dances.
• Katazoe Beach Taiko: A creative drum performance symbolizing local festivals.