Ports & Harbours of the Seto Inland Sea
YearMaps maps 44 harbours on the Seto Inland Sea, in Japan. The largest by the World Port Index's harbour size are Onomichi-Itozaki, Osaka, Kobe, Hiroshima, Tokuyama and Ube Ko. One is written up in full below, and every harbour is listed with its depths, tidal range and the largest ships it takes.
The Seto Inland Sea separates Honshu, Shikoku and Kyushu, a sheltered waterway scattered with some 3,000 islands. For more than a thousand years it was Japan's main highway between the capital region and Kyushu, travelled by envoys to China and by the merchants of Sakai and Osaka, and its shores hold the shipyards and industrial harbours of Osaka, Kobe, Hiroshima and Mizushima.
- Harbours
- 44
- Countries
- 1
- Large Harbours
- 3
- Written Up
- 1
Map of the Ports of the Seto Inland Sea
Blue dots are the harbours of the World Port Index; tap or click one to open its entry. Use the layer panel to add trade routes, rivers and historical borders.
Osaka
The harbour of the Seto Inland Sea with an encyclopedia article, each with its figures from the World Port Index.
Osaka
Major harbour · Japan
The Port of Osaka (大阪港, Ōsaka-kō) is the main port in Japan, located in Osaka within Osaka Bay. The Port of Osaka also has several sister ports including the Port of Busan.
Adapted from Wikipedia: Port of Osaka (CC BY-SA 4.0).
- Harbour size
- Major
- Channel depth
- 34.7 m
- Anchorage depth
- 23.8 m
- Cargo pier depth
- 27.4 m
- Oil terminal depth
- 45.7 m
- Tidal range
- 1 m
- Largest vessel
- large vessels
- Country
- Japan
- Province
- Osaka Prefecture
- Coordinates
- 34.6500°, 135.4300°
More about Osaka
All Harbours of the Seto Inland Sea
44 harbours, the largest first by the index's harbour size. Channel depth and tidal range set the physical limit on which ships can call. 5 of them are recorded in the source with the city they serve.
| Harbour | Country | Size | Channel | Anchorage | Tide | Largest vessel | Map |
|---|---|---|---|---|---|---|---|
| Onomichi-Itozaki | Japan | Major | 38.4 m | 38.4 m | 3 m | large vessels | |
| Osaka | Japan | Major | 34.7 m | 23.8 m | 1 m | large vessels | |
| Kobeserves Kōbe | Japan | Major | 27.4 m | — | 2 m | large vessels | |
| Hiroshima | Japan | Medium | 42.1 m | — | 4 m | large vessels | |
| Tokuyama | Japan | Medium | 34.7 m | 23.8 m | 3 m | large vessels | |
| Ube Ko | Japan | Medium | 34.7 m | 45.7 m | 4 m | large vessels | |
| Higashi-Harima | Japan | Medium | 27.4 m | 16.5 m | 1 m | large vessels | |
| Mizushima Ko | Japan | Medium | 27.4 m | 12.8 m | 3 m | large vessels | |
| Fukuyama | Japan | Medium | 23.8 m | 23.8 m | 4 m | large vessels | |
| Himeji | Japan | Medium | 23.8 m | 23.8 m | 1 m | large vessels | |
| Sakai-Senboku | Japan | Medium | 23.8 m | 38.4 m | 1 m | medium vessels | |
| Iwakuni Ko | Japan | Medium | 9.1 m | 27.4 m | 3 m | large vessels | |
| Niihama | Japan | Small | 45.7 m | 16.5 m | 3 m | large vessels | |
| Onoda | Japan | Small | 45.7 m | 45.7 m | 4 m | — | |
| Imabari Ko | Japan | Small | 42.1 m | 20.1 m | 3 m | medium vessels | |
| Kudamatsu | Japan | Small | 42.1 m | 38.4 m | 3 m | medium vessels | |
| Amagasaki | Japan | Small | 38.4 m | 34.7 m | 2 m | medium vessels | |
| Matsuyama | Japan | Small | 38.4 m | — | 3 m | large vessels | |
| Mishima-Kawanoe Ko | Japan | Small | 38.4 m | 20.1 m | 4 m | large vessels | |
| Saganoseki Ko | Japan | Small | 38.4 m | 20.1 m | 2 m | medium vessels | |
| Tonda | Japan | Small | 38.4 m | 31.1 m | 3 m | — | |
| Hannan Ko | Japan | Small | 34.7 m | 20.1 m | 2 m | medium vessels | |
| Shikama | Japan | Small | 34.7 m | — | 1 m | medium vessels | |
| Takuma | Japan | Small | 34.7 m | 42.1 m | 4 m | large vessels | |
| Hikari | Japan | Small | 31.1 m | — | — | medium vessels | |
| Aioi | Japan | Very Small | 45.7 m | 45.7 m | 1 m | large vessels | |
| Habu Ko | Japan | Very Small | 42.1 m | 34.7 m | — | large vessels | |
| O0kihama | Japan | Very Small | 38.4 m | — | 1 m | medium vessels | |
| Takamatsu | Japan | Very Small | 38.4 m | — | 2 m | large vessels | |
| Kakogawa | Japan | Very Small | 34.7 m | 42.1 m | — | medium vessels | |
| Kanda | Japan | Very Small | 34.7 m | 45.7 m | 2 m | large vessels | |
| Marugame Ko | Japan | Very Small | 34.7 m | — | 6 m | large vessels | |
| Hibi Ko | Japan | Very Small | 31.1 m | 42.1 m | 2 m | large vessels | |
| Sakaide Ko | Japan | Very Small | 31.1 m | 23.8 m | 1 m | large vessels | |
| Uno Ko | Japan | Very Small | 31.1 m | 42.1 m | 2 m | large vessels | |
| Mega | Japan | Very Small | 27.4 m | — | 2 m | medium vessels | |
| Hirohata | Japan | Very Small | 20.1 m | — | 1 m | — | |
| Kanokawa Ko | Japan | Very Small | 20.1 m | 34.7 m | 8 m | large vessels | |
| Mitsukojima | Japan | Very Small | 20.1 m | — | 4 m | medium vessels | |
| Beppu | Japan | Very Small | 5.5 m | 5.5 m | 2 m | large vessels | |
| Kikuma Ko | Japan | Very Small | 5.5 m | 5.5 m | — | large vessels | |
| Namikata | Japan | Very Small | 5.5 m | — | 4 m | medium vessels | |
| Oita Koserves Ōita | Japan | Very Small | 5.5 m | — | 2 m | large vessels | |
| Yanai | Japan | Very Small | — | 20.1 m | 1 m | medium vessels |
Port Cities of the Seto Inland Sea
The most populous cities with a harbour of the Seto Inland Sea within 25 km. Each city is listed with its country's other cities on the country page.
- Ōsaka11.29 million
Japan · Osaka (12 km), Sakai-Senboku (23 km), Amagasaki (9 km)
- Hiroshima2.04 million
Japan · Hiroshima, Kanokawa Ko (23 km), Mitsukojima (24 km)
- Kōbe1.53 million
- Kitakyūshū997,536
Japan · Kanda (21 km)
- Okayama866,092
Japan · Mizushima Ko (24 km), Hibi Ko (25 km), Uno Ko (22 km)
- Matsuyama533,541
- Ōita448,907
Japan · Saganoseki Ko (25 km), Beppu (11 km), Oita Ko
- Takamatsu334,223
Japan · Takamatsu, Marugame Ko (25 km), Hibi Ko (16 km), Sakaide Ko (18 km)
- Shimonoseki245,786
- Kure196,991
Japan · Hiroshima (19 km), Kanokawa Ko (15 km), Mitsukojima (9 km)
Countries with Harbours on the Seto Inland Sea
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See every sea, grouped from North America to Oceania & Antarctica, on the world ports index, or the voyages that crossed these waters on the famous sea voyages map.
Seto Inland Sea: Quick Answers
- How many ports are there on the Seto Inland Sea?
- YearMaps lists 44 ports and harbours on the Seto Inland Sea, from the World Port Index of the US National Geospatial-Intelligence Agency. Small fishing harbours and private terminals outside the index are not counted.
- Which countries have ports on the Seto Inland Sea?
- Japan (44).
- What are the largest ports on the Seto Inland Sea?
- By the World Port Index's harbour size, the largest are Onomichi-Itozaki, Osaka, Kobe, Hiroshima, Tokuyama and Ube Ko.
- What are the main port cities on the Seto Inland Sea?
- The most populous cities with a harbour here are Ōsaka (11.29 million), Hiroshima (2.04 million), Kōbe (1.53 million), Kitakyūshū (997,536) and Okayama (866,092).