Skip to navigation Skip to main content

About Kagawa

Diving in Kagawa Prefecture offers a unique opportunity to explore the underwater wonders of Japan's smallest prefecture, situated on the picturesque Shikoku Island.

Despite its small size, Kagawa's coastal waters are rich in marine biodiversity, providing divers with an array of dive sites to explore. The prefecture is bordered by the Seto Inland Sea, which boasts clear waters and a diverse range of marine life.

One of the primary diving destinations in Kagawa is within the Setonaikai National Park, where divers can encounter vibrant coral reefs, rocky outcrops, and underwater caves. This national park encompasses parts of the Seto Inland Sea, offering a variety of underwater landscapes to explore. Divers can expect to encounter colorful fish, octopuses, sea cucumbers, and other fascinating marine creatures while exploring the park's underwater terrain.

Additionally, Kagawa Prefecture is home to the Otaki-Okawa Prefectural Natural Park, which further contributes to the preservation of the region's natural beauty and marine ecosystems. Divers can explore this protected area's underwater habitats, which may include seagrass beds, sandy bottoms, and rocky reefs, providing opportunities to encounter a diverse range of marine life.

Whether you're a beginner or experienced diver, Kagawa Prefecture offers unforgettable diving experiences amidst its tranquil coastal scenery and rich marine biodiversity. With its clear waters and abundant marine life, Kagawa is a hidden gem for diving enthusiasts seeking to explore Japan's underwater world.

Local Areas

Kagawa Area Map

Areas in Kagawa


In the door step of Seto Inner Sea

This is a Inner ocean surrounded by Honshu,Shikoku,Kyushu. Due to it's location, not getting the warm current benefit on the Pacific Ocean side, the water temperature varies from 8c to 32c. This change in the water temperature can show you the 4 seasons of underwater Japan. The fishes here are mainly preferred as a sushi dish(Cold water fishes). 

What you can see

All year round:
-Variety of nudibranch
-Variety of Shrimps and Crabs
-Variety of Macro marine life
-Black rockfish (Sebastes inermis
-Thread-sail filefish (Stephanolepis cirrhifer)
-Black porgy(Mylio macrocephalus)
-Asian sheepshead wrasse(Semicossyphus reticulatus)
-Japanese sea bass(Lateolabrax japonicus)
-Large school of Striped mullet(Mugil cephalus)