Secret caves and a heart-shaped island

Secret caves and a heart-shaped island

Travel guide  by the Japan National Tourism Organization

Located in western Hokkaido near Otaru , Cape Shakotan juts into the Sea of Japan. You can dive and snorkel in the clear blue waters, explore in a sea kayak, and meet dolphins, whales and other sea life during guided tours. The large mountain resort areas on the peninsula offer a variety of outdoor sports possibilities, too, and when you're all done, you can relax in local hot springs.

https://www.japan.travel/en/spot/2160/