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Korean Shine Muscat is a premium seedless green grape originally bred in Japan and now widely grown in South Korea. The berries are large, thin-skinned and edible whole, with a crisp, juicy bite and a distinctive floral muscat aroma. Sugar levels typically reach 16–20°Brix. Peak season is August–October. It is often more affordable than Japanese Shine Muscat of comparable quality.
Variety background
Shine Muscat is a Japanese table-grape cultivar created in 1988 by crossing Akitsu-21 (Steuben × Muscat of Alexandria) with Hakunan, and registered in 2006 as “Grape Agriculture and Forestry No. 21.” South Korea introduced the variety around 2007 and scaled commercial production from about 2013. Because Japan missed the window for international plant-variety protection, Korean growers could propagate it without royalties. It then became one of Korea’s flagship premium fruits and a major export to Hong Kong, Taiwan and Southeast Asia.
Growing regions
The heartland is North Gyeongsang Province (Gyeongsangbuk-do), especially Gimcheon, Sangju and Yeongcheon. Gimcheon is frequently cited as a top origin. Large day–night temperature swings, long sunshine hours and relatively low rainfall help concentrate sugars. Premium farms use cluster thinning, paper bagging and strict sugar-colour checks. Elite lines such as “Gongju” (Princess) Shine Muscat require one bunch per vine, minimum bunch weight around 600 g, colour grade 3+, and average sweetness of at least 16°Brix (often higher).
Look and taste
• Colour: bright yellow-green
• Berry size: typically 10–17 g
• Bunch: 400–1,000 g
• Skin: thin, almost no astringency — eat with the skin
• Seeds: virtually seedless
• Texture: firm-crisp and juicy
• Aroma: floral muscat; often compared to mango, lychee or honey
• Sweetness: quality fruit commonly 17°Brix+, premium lots 18–20°Brix, with low acidity
Choose bunches with even, plump berries that cling to the stem, a clean bloom, and no softness or browning. Slightly more yellow-green usually means riper and sweeter than very grassy green.
Season and storage
Main harvest is August–October; greenhouse fruit can appear from July, and cold-chain exports last into winter. Keep refrigerated in the crisper for several days. Wash thoroughly under running water before eating.
Nutrition
High in natural sugars (about 15 g per 100 g). Provides vitamin C, vitamin K, fibre and skin polyphenols. A sensible serving is about 5 berries (one fruit portion); many dietitians suggest a daily cap around 10 berries. People managing blood sugar or kidney disease should eat only small amounts. Eating the skin retains more antioxidants.
Korea vs Japan
Japanese Shine Muscat — especially Okayama “Shine Oou / 晴王” and top Nagano or Yamanashi lots — is often firmer and more consistent, and priced higher. Korean fruit can match or even exceed Japanese fruit in aroma and value when well grown, but quality varies more because of rapid acreage expansion and early picking. Look for named premium programmes, stated Brix and a reputable importer rather than the generic label alone.
