It is native to Japan, the Korean Peninsula, the Ryukyu Islands, and Taiwan,[1] where it is common on rocky slopes and growing up the trunks of trees, especially in laurel forest, a type of cloud forest.

It is an evergreen climbing plant, growing to 10 m high where suitable surfaces (trees, cliffs, walls) are available, and also growing as ground cover where there are no vertical surfaces.

It climbs by means of aerial rootlets which cling to the substrate.

[2] The leaves are medium green and have a rhombic diamond shape that give it its species name, rhombea.

The bisexual flowers are 4–5 mm in diameter and yellow-green, in erect umbels.