Pinus densiflora is a species of tree commonly called "Japanese red pine" or "Korean red pine". There are several other synonyms for this tree, including Pinus densifolia, Pinus massoniana var. densiflora, and Pinus maruyamae. The tree is known for its reddish bark and long, sharp needles which grow in clusters. It is a popular ornamental tree in gardens and parks around the world. In addition to its aesthetic value, the Pinus densiflora is also used for timber and as a source of resin. The tree is native to Japan and Korea, but has been widely planted in other parts of the world as well.