日本南五味子（学名：Kadsura japonica）为木兰科南五味子属下的一个种。

Kadsura japonica, commonly known as the Kadsura vine or simply Kadsura, is a plant species native to Japan (Honshū, Kyūshū and the Ryukyu Islands) in woodlands.. The larvae of the moth Caloptilia kadsurae feed on K. japonica in the main Japanese islands and Ryukyu Islands.