The Nansei Islands subtropical evergreen forests is a terrestrial ecoregion of the Ryukyu Islands, also known as the Nansei Islands, in Japan. The Nansei Islands are an island arc that stretches southwest from Kyushu towards Taiwan. The larger islands are mostly volcanic islands and the smaller ones mostly coral. The largest is Okinawa Island. The highest point is Mount Miyanoura on Yakushima Island at 1,936 metres.

Yakushima (屋久島) is one of the Ōsumi Islands in Kagoshima Prefecture, Japan. The island, 504.88 km2 (194.94 sq mi) in area, has a population of 13,178. Access to the island is by hydrofoil ferry, slow car ferry, or by air to Yakushima Airport . Administratively, the whole island is the town of Yakushima. The town also serves neighbouring Kuchinoerabujima. 42% of the island is within the borders of the Yakushima National Park.