Causonis japonica (also known by its synonym Cayratia japonica and common names bushkiller, yabu garashi and Japanese cayratia herb) is the type species of vine plant in its genus and is native to Tropical and Subtropical Asia, Australia and the West Pacific.

[1] It is used as a traditional Chinese medicine to relieve swelling and heat, and to enhance diuresis and detoxification.

C. japonica is a perennial herbaceous vine with compound, alternately branching leaves.

C. japonica has been introduced in tropical areas of the United States including Texas, Louisiana, Mississippi, Alabama, and North Carolina.

Using cutting the stems at the ground and applying a systemic herbicide will often kill the plant.