Cellulase

Cellulase is an enzyme that hydrolyzes cellulose (plant fiber), and it plays an important role in sake brewing. Cellulase preparations are used especially when processing polished rice with low water absorption, such as hard rice. They make the starch in the rice easier to dissolve, which promotes fermentation by koji and helps produce sake with a rich flavor. Through the action of this enzyme, the rice becomes more digestible and the fermentation process more efficient, contributing to improved quality.