Bred and cultivated in Japan in 1937, Kyoho grapes are very large in size, round to oval in shape, and have a dark purple, almost jet-black skin that is thick, firm, glossy, and bitter. In addition, these gorgeous grapes have an incredibly juicy, translucent green flesh that is almost gelatinous in texture with moderately low acid content. Nutrition-wise, Kyoho grapes are an excellent source of vitamin C, potassium, thiamine, dietary fiber and resveratrol- an important phytonutrient in maintaining heart health.