Sea of Japan at a glance
- 1,725 maverage depth
- 1,652 mmedian depth
- 3,849 mmaximum depth
- 951,141 km²water area
Sea of Japan is a sea. Inside its outline the GEBCO grid has about 951,141 km² of water, with an average depth of about 1,725 m (the middle value is 1,652 m) and a maximum of 3,849 m, found at 41.67° N, 138.27° E.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Sea of Japan?
The bar splits the Sea of Japan's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 17.9%
- 200 to 1,000 m: 17.9%
- 1,000 to 4,000 m: 64.2%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Yamato Ridge (380 km), Japan Trench (537 km), Kushiro Submarine Canyon (561 km), Erimo Seamount (566 km).
The Sea of Japan if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Sea of Japan's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 2,928 km² | 0.3% |
| 20 m | 7,677 km² | 0.8% |
| 50 m | 31,158 km² | 3.3% |
| 80 m | 68,059 km² | 7.2% |
| 120 m | 111,920 km² | 11.8% |
| 200 m | 170,225 km² | 17.9% |
| 500 m | 244,525 km² | 25.7% |
| 1,000 m | 340,612 km² | 35.8% |
| 2,000 m | 542,980 km² | 57.1% |
| 3,000 m | 732,629 km² | 77% |
| 4,000 m | 951,141 km² | 100% |
| 6,000 m | 951,141 km² | 100% |
A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.
Nearby seas
- Inner Sea average depth about 38 m
- Sea of Okhotsk average depth about 881 m
- Yellow Sea average depth about 46 m
- Bo Hai average depth about 18 m
- East China Sea average depth about 403 m
- Shelikhova Gulf average depth about 87 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Sea of Japan?
On average about 1,725 m in the GEBCO grid (the middle value is 1,652 m). The deepest cell inside its outline is 3,849 m, at 41.67° N, 138.27° E.
How big is the Sea of Japan?
About 951,141 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Sea of Japan would be land if sea level dropped?
With the sea 50 m lower, about 31,158 km² (3.3%) of its water would be land. At 6,000 m lower, 100% would be. This is a simple bathtub model that lowers the sea evenly everywhere.
Data: depths from the GEBCO_2026 grid, statistics worked out inside the Natural Earth outline of the sea. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.