Off the coast of Japan, sea levels are rising … and falling. No one knows why
- Posted on December 17, 2025
- By CNN
- 2 Views
Off the coast of Japan, sea levels are rising … and falling. No one knows why

In recent years, a major ocean current changed its path in two crucial ways. Now parts of the sea are rising, other parts are falling, ocean temperatures are breaking records — and Japan’s iconic fishing industry is in trouble.