The Tropical & Subtropical Arboretum (熱帯・亜熱帯都市緑化植物園 Nettai Anettai Toshi Ryokka Shokubutsuen) is a 9-hectare (22-acre) arboretum and botanical garden located in the southern tip of the Okinawa Commemorative National Government Park (Ocean Expo Park) at Ishikawa 424, Motobu-cho, Kunigami-gun, Okinawa, Japan. It is open daily without charge.
The arboretum was established in August 1976 on the site of the 1975 Okinawa Ocean Expo, and describes itself as the only tropical and subtropical arboretum in Japan with Okinawan climate. Its mission is education and the promotion of the urban afforestation, with sample gardens including nearly 37,500 plants representing 320 species of tropical and subtropical plants. Major arboretum features include an herb garden, hedge & vine area, ground cover area, street trees, and sections for salt and wind tolerant trees, palm trees, and bushes.