The white grape variety is grown in Japan cultured; the origin is unknown. Synonyms are Kochiou, Konshu, Koshiou, Koshiourebe and Koushuu. It is named after the former province of Kōshū, which roughly coincides with today's prefecture Yamanashi covers. According to a hypothesis, it allegedly came from Europe via the Silk Road as early as the 8th century China and was introduced to Japan by Buddhist monks. According to another hypothesis, it was discovered by a certain Amemiyas Kageyu around 1186 in the south of the Kofu valley at the foot of Mount Fujiyama. According to in 2006 DNA analysis it is a species Vitis vinifera, which makes the hypotheses unlikely. There is a close relationship to the variety Koshu Sanjaku, Koshu was a crossing partner of the new varieties Koshu Semillon and Komahikari,
The late-ripening vine is susceptible to both mildews but resistant to Botrytis, It is traditional Pergola education systemTanazukuri cultivated and is ideally suited to the climatic conditions in Japan. The rose-colored, thick-skinned berries produce fresh, low-alcohol and rather low-extract white wines that serve as a blend for red and white wines. Above all, it is considered table grape and also for distillation used. It is mainly grown in Yamanashi Prefecture on the main island of Honshu. In 2010, 168 hectares of vineyards were reported (Statistics Kym Anderson ).