In recent years, the exportation of the Japanese traditional
alcoholic beverage, sake, has increased remarkably owing to the
escalating demand worldwide. Sake is brewed using sake yeast
(Saccharomyces cerevisiae) with steamed rice, koji (Aspergillus oryzae,
cultured on steamed rice), and a significant amount of water
(1). This alcoholic beverage is known to contain various components
(e.g., carbohydrates, organic acids, nitrogenous compounds,
inorganic species), which contribute to the quality of the product