Shunkunitai located in Nemuro Peninsula in the eastern part of Hokkaido is a huge sandbar, 8km long by 1.3km wide, which divides the Sea of Okhotsk and Lake Furen. On the accumulated three lined dunes, there are many kinds of natural surroundings such as seashores, grasslands, marshes, forests and mudflats. Providing fine natural environment for various kinds of wildlife, it looks like a floating forest.

Its academic importance is highly esteemed. In the center of the dune is the greatest Ramanas rose (Rosa rugosa) colonies, which continues 3 km. In the wetland along the sea is the breeding ground of red-crowned cranes. White-tailed eagles inhabit here, for there are abundant fish in the ocean near the sandbar range. Shunkunitai is one of the nation's eminent paradises for wildfowl.