Rihaku is named for the famous Chinese poet Li Po (known in Japan as Rihaku) who lived from 701-762 and was famous for his love of sake and how he drew his inspiration from it. He was known to have said, "I drink a bottle and can write 100 poems." Founded in 1882, Rihaku proudly boasts the highest average rice milling rate of all Japanese sake breweries. The toji continues to use the same traditional methods as they did in the late 1800’s; except now they employ the help of selective technology which results in a better sake. Rihaku’s koji-making machine uses metal “fingers” to mix the koji every few hours, which allows for tighter control of temperature and moisture resulting in cleaner and more consistent koji. Rihaku is located in the Shimane Prefecture, the Toji is Mitsuo Yoshioka, and president is Yuichiro Tanaka.

Rihaku's Dreamy Clouds is a Nigori sake; Nigori translates to "cloudy". Nigori sakes have a cloudy appearance due to the unfermented rice solids that are not filtered out, allowing the sake to have a slightly creamy, textured quality that enhances the drinking experience. This Nigori — crafted with Gohyakumangoku rice — is quite special because its Seimaibuai value is 59%, meaning that 41% of the grain has been polished away, which technically qualifies it as Junmai Ginjo: a rare quality level for a Nigori sake. The nose is lead by steamed rice, fresh red plums and notes of roasted peanuts. It is uniquely bright and lean in the mouth with a chewy mouthfeel and sweet rice flavors intermingling with the nutty and slightly fruity characteristics of this style.