The Vitis amurensis Ruprecht is a deciduous vine plant of the grape family. Also called "mountain grapes," this vine grows autogenously in forests teeming at the foot of mountains of between valleys at high altitudes of 100 to 1,650 meters above sea level. It can be found throughout Japan, China and Korea. Blossoming many small, yellow-green flowers around June, it has tendrils that grow beneath flower spikes and could stretch as long as 10 meters, with grains at 8 mm in diameter.