Sea of Japan vs. Yellow Sea: Size Comparison
The Sea of Japan is significantly larger.
| Metric | Sea of Japan (East Sea) | Yellow Sea |
|---|
| Surface Area | 978,000 km² (377,600 sq mi) | 380,000 km² (146,700 sq mi) |
| Average Depth | 1,752 m | 44 m |
| Max Depth | 3,742 m | 106 m |
| Volume | 1,713,000 km³ | 16,700 km³ |
| Type | Deep marginal basin | Shallow epicontinental shelf sea |
Why the Difference?
- Sea of Japan: Formed by back-arc spreading (15–20 Ma) behind the Japanese island arc; deep basins (Japan, Yamato, Tsushima).
- Yellow Sea: Flooded continental shelf (<50 m avg); gets yellow color from Huang He (Yellow River) sediment.
Shared & Distinct
- Both are marginal seas of the NW Pacific; both bordered by China, Korea, Japan (Yellow Sea: China, N/S Korea only).
- Naming dispute: "Sea of Japan" (Japan, international standard) vs. "East Sea" (Korea) / "East Sea of Korea" (N. Korea).
- Yellow Sea includes Bohai Sea (innermost gulf).
Bottom line: Sea of Japan ≈ 2.6× the area, 100× the volume of the Yellow Sea.
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