日本木瓜（学名：Chaenomeles japonica）为蔷薇科木瓜属下的一个种。

Chaenomeles japonica is a species of Japanese Quince. It is a thorny deciduous shrub that is commonly cultivated. It is shorter than another commonly cultivated species C. speciosa, growing to only about 1 m in height. The fruit is called Kusa-boke(草木瓜,Kusa-boke) in Japanese. It is best known for its colorful spring flowers of red, white, pink or multi. It produces apple-shaped fruit that are a golden-yellow color containing red-brown seeds. The fruit is edible, but hard and astringent-tasting, unless bletted. The fruit is occasionally used in jelly and pie making as an inferior substitute for its cousin, the true quince, Cydonia oblonga. C. japonica is also popularly grown in bonsai.