Ryugan is a grey-skinned Japanese variety of unknown origin.

Ryugan is a grey-skinned grape. The wines generally taste of Japanese pear and have well-balanced acidity.

Ryugan is primarily grown in Nyugan, Japan. Ryugan has large bunches of large berries and is susceptible to botrytis bunch rot. Ryugan wines can be paired with a variety of dishes, including fish, seafood and light cheeses.

Ryugan is said to have been introduced from China in the late nineteenth century.