Japan
34°12′N 133°03′E
Santō Gochō
Part of Ochi Islands
Chart
Major islands
Ōmishima Island
- Area
- 64.5 km²
- High point
- 436 m
Ōmishima Island (大三島, Ōmishima) is the largest island in the Geiyo Islands chain, and the westernmost island on which Japan's Nishiseto Expressway, which links Honshu and Shikoku via a number of islands, runs. It is located in the Seto Inland Sea.
Ōshima
- Area
- 41.9 km²
- High point
- 307 m
Ōshima (大島) is an inhabited island in the Geiyo Islands in the Seto Inland Sea of Japan, lying between the larger islands of Honshū and Shikoku.
Hakatajima
- Area
- 20.4 km²
- High point
- 301 m
Hakata Island (伯方島, Hakatajima) is an island in the Inland Sea of Japan. Administratively, it is part of the city of Imabari, Ehime Prefecture. Originally, there was a town of the same name on this island, but it was merged into Imabari in 2005.
Islets
- Michikajima Island43 m · 0.08 km²
- Noshima15 m · 0.02 km²
- 鯛崎島1 m · 0.3 ha
- 鶏小島0.1 ha
- Unnamed island0.1 ha
Rocks & skerries
- Unnamed island<0.1 ha
- 小丸子島<0.1 ha
- Unnamed island<0.1 ha
- Mitsuko Jima<0.1 ha
- Unnamed island<0.1 ha
- Unnamed island<0.1 ha
Figures
Comparative heights
- Ōmishima: 436 m
- Ōshima: 307 m
- Hakatajima: 301 m
- Michikajima: 43 m
- Noshima: 15 m
- 鯛崎島: 1 m
To the same scale
Islands by area
| Ōmishima Island | 64.5 km² |
| Ōshima | 41.9 km² |
| Hakatajima | 20.4 km² |
| Michikajima Island | 0.08 km² |
| Noshima | 0.02 km² |
| 鯛崎島 | 0.3 ha |
| 鶏小島 | 0.1 ha |
| Unnamed island | 0.1 ha |
| Unnamed island | <0.1 ha |
| 小丸子島 | <0.1 ha |
| Unnamed island | <0.1 ha |
| Mitsuko Jima | <0.1 ha |
| Unnamed island | <0.1 ha |
| Unnamed island | <0.1 ha |
Photographs
Hakata-Oshima Suspension Bridge taken from Oshima

Omishima Bridge in Ehime prefecture, Japan
Sources
Facts
- Geometry, areas and high points: OpenStreetMap contributors (ODbL), Copernicus GLO-30, via Talus.
- Wikidata
Photographs
- Hakata-Oshima Bridge. Vickerman625 / Public domain
- Omishima Bridge. mukarin from Tokyo, Japan / CC BY-SA 2.0