The urushi tree, also known as Toxicodendron vernicifluum, is a deciduous tree native to East Asia. It is primarily found in countries like Japan, China, and Korea. The tree is known for its sap, which is used to produce urushi lacquer, a traditional finish that is highly valued for its durability and beauty. The sap of the urushi tree contains a resin that hardens when exposed to air, creating a glossy and water-resistant surface. This lacquer has been used for centuries in various crafts, including pottery and furniture, and is an important part of Japanese culture and art.