Acidic potassium phosphate
酸性リン酸カリウムさんせいりんさんかりうむAcidic potassium phosphate (potassium dihydrogen phosphate) is one of the additives that plays an important role in sake brewing. It is used mainly to support fermentation, and is added to the brewing water or during the brewing process to help keep fermentation healthy. The substance promotes the activity of yeast and stabilizes the fermentation process, and is expected to improve the quality of the finished sake. Acidic potassium phosphate is often used together with other acids and nutrients, which helps establish a favorable fermentation environment and brings out better flavor and aroma.