An yeast isolated from ginjo moromi (the main mash for ginjo-shu) used in Saura brewery, which is the producer of "Uragasumi," by Kazuo SATO and others of the brewing laboratory of Sake Makers' Association of Miyagi Prefecture in 1965.
昭和40年（1965年）宮城県酒造組合醸造試験所の佐藤和夫らにより、『浦霞』の醸造元である佐浦の吟醸醪より分離。