barley kōji
Kōji mold (Aspergillus oryzae) grown on steamed barley, used as a starter for fermented foods such as miso and shōchū.
See also: 麹
I make barley miso using barley kōji.
This shōchū is brewed with barley kōji.
Compound of 麦 (mugi, 'barley') and 麹 (kōji, 'kōji mold'). The reading むぎこうじ is a straightforward combination of the two words.