It is about 3 km around the Esuzaki Island. There is a Esuzaki-Myojin (Kasuga-jinja Shrine) in the middle and whole Island is sacred area though. These forest are designated as a special national natural treasure in 1953.?
It is not far from Esumi station which is JR train line that takes 5 mins by car and You are able to park your vehicle for free in Douyou-park. You have to walk down the steep stairs then head to Esuzaki Island is the best way.