noun
black koji mold; Aspergillus niger; Aspergillus awamorii
A filamentous fungus used in fermentation, especially for awamori and shochu. The term covers both Aspergillus niger and Aspergillus awamorii, which are closely related black-spored koji molds.
黒麹菌は泡盛の製造に欠かせない。
Black koji mold is essential for making awamori.
黒麹菌はクエン酸を
Because black koji mold produces a lot of citric acid, it suppresses the growth of unwanted bacteria.