Sea of Japan: Bordering Nations and Geographic Context
The Sea of Japan (East Sea) is a marginal sea of the western Pacific Ocean, bordered by four nations:
Bordering Countries
| Country | Coastline | Key Ports | EEZ Claim |
|---|
| Japan | West coast of Honshu, Hokkaido, Kyushu | Niigata, Toyama, Sakaiminato, Fushiki | 200 nm / median line |
| Russia | Primorsky Krai (Vladivostok region) | Vladivostok, Nakhodka, Vostochny | 200 nm / median line |
| North Korea | East coast (short) | Rajin, Chongjin, Wonsan | 200 nm / median line |
| South Korea | East coast (Gangwon, N. Gyeongsang) | Pohang, Ulsan, Mukho, Sokcho | 200 nm / median line |
Geographic Boundaries
- North: Tatar Strait (to Sea of Okhotsk), La Pérouse Strait (to Okhotsk)
- South: Korea Strait (to East China Sea), Tsushima Strait
- East: Japanese archipelago
- West: Asian mainland (Russia, NK, SK)
- Area: 978,000 km² (377,600 mi²)
- Max depth: 3,742 m (Dohoku Seamount)
Naming Dispute
- Japan: "Sea of Japan" (internationally established, IHO)
- South Korea: "East Sea" (동해, Donghae)
- North Korea: "East Sea of Korea" (조선동해, Joseon Donghae)
- Compromise: "Sea of Japan (East Sea)" used by some atlases
Oceanography
- Three basins: Japan Basin (north), Yamato Basin (center), Tsushima Basin (south)
- Circulation: Tsushima Current (warm, northward) + Liman Current (cold, southward)
- Isolation: Deep water renewal ~100 years; anoxic below 250 m in north
- Productivity: High (upwelling, mixing) — squid, crab, pollock, salmon fisheries
Strategic Importance
- Vladivostok = Russia's only warm-water Pacific port
- Major shipping lanes (NE Asia ↔ Americas)
- Submarine transit routes
- Disputed features: Liancourt Rocks (Dokdo/Takeshima)
The Sea of Japan is a semi-enclosed, biologically rich, geopolitically sensitive marginal sea central to Northeast Asian geography.
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