UONUMA JOZO CO., LTD. is one of the world's largest rice koji manufacturing factories, located in Niigata, Japan. It specializes in producing rice koji, koji amazake, and other fermented products that leverage the region's pristine snowmelt water and rice. The company’s signature product, is made entirely from rice and rice koji, offering a nutrient-rich, non-alcoholic beverage. The factory is committed to the traditional Japanese fermentation process while innovating in food products for both domestic and international markets.