Setonaikai National Park is a Japanese national park, comprising areas of Japan's Seto Inland Sea, and of ten bordering prefectures. Designated a national park in 1934, it has since been expanded seve

Tomogashima is a cluster of four islands in the Inland Sea, off Wakayama, Wakayama, Japan. The four islands are Jinoshima, Kamishima, Okinoshima, and Torajima. The islands form part of the Setonaikai