Konjac tuber a perennial herb. Origin Japan, India, Sri Lanka, the Malay Peninsula, southwest China planted many years, one of China since ancient times is the ancient books of herbs. Distributed in Vietnam, Thailand and the Himalayas to Gansu, Ningxia, to the southern provinces, and Shaanxi in China in recent years, especially in Sichuan, Yunnan, Guizhou area for mass production. Taiwan's Puli, fish pond, Taitung and other places also have production, growing at an altitude of 310 meters to 2,200 meters in the area, mostly grown in the forest edge, next to woodland and valleys lined with moist.