Sagami Sea

Sagami Sea lies between Miura Peninsula and Izu Peninsula, extending to depths of 1,500 meters (4,921 feet) and containing varied marine zones with different conditions. Multiple rivers including Hikiji, Sagami, and Sakai flow into these waters, creating environments where many fish species and marine organisms thrive.

In 1923, a powerful earthquake originated beneath Izu Oshima Island within these waters, causing severe damage across the region and beyond. This event fundamentally changed how people understood the geological forces shaping the area.

This sea has long supported fishing communities along its shores, shaping local food traditions and livelihoods in the surrounding coastal towns. The catch from these waters remains central to regional cooking and commerce.

The sea is accessible from several coastal towns and offers good conditions for fishing and observing marine life from the shores. Visitors should prepare for changing weather conditions, as the deeper zones can experience strong currents.

Despite covering only a small fraction of Japan's waters, this sea holds roughly 16.5 percent of the nation's marine species. This remarkable concentration makes it one of the most biodiverse areas in the country.

Location: Japan

GPS coordinates: 34.96667,139.38333

Latest update: December 12, 2025 08:00