Mizushima Sea

Mizushima Sea is a sea passage located between Okayama and Kagawa Prefectures in the northern section of the Seto Inland Sea. Multiple islands dot the waters, and various coastal communities depend on this channel for connectivity and commerce.

The waterway became critical for maritime trade during Japan's industrialization period, enabling the growth of Mizushima Port and surrounding commerce. This shipping route supported regional economic development as industries expanded along its shores.

Local fishing communities maintain traditional fishing methods in the Mizushima Sea, particularly around the Kasaoka Islands group of thirty-one distinct formations.

The passage maintains shipping lanes suitable for large commercial vessels and regular traffic. Visitors can explore the area best from coastal viewpoints or by traveling along the roads that follow the shoreline.

Seven inhabited islands within the Mizushima Sea waters preserve independent communities, each maintaining distinct industrial and social characteristics.

Location: Okayama Prefecture

Location: Kagawa Prefecture

Part of: Seto Inland Sea

GPS coordinates: 34.41667,133.66667

Latest update: December 14, 2025 14:42