Rubus coreanus

Rubus coreanus, known as bokbunja (Korean: 복분자), Korean blackberry, or Korean bramble, is a species of raspberry native to Korea, Japan, and China. It produces edible berries (not 'true berries' in the botanical sense) that can be fermented into bokbunja ju (Korean: 복분자주), a Korean fruit wine (although the majority of fruit commercially grown for producing this drink are actually Rubus occidentalis, native to North America). R. coreanus fruits are usually harvested between May and July at peak harvest season. They can only be cultivated in a few areas in Korea, different to Rubus occidentalis, which can be cultivated widely across the country....read more on Wikipedia.