noun
kōji fermentation room
A dedicated room or chamber used in the production of kōji (麹), the mold-inoculated grain essential for making sake, miso, soy sauce, and other fermented foods.
See also: 麹 (こうじ)
酒蔵の麹室は温度と湿度が厳密に管理されている。
The kōji room in the sake brewery is strictly controlled for temperature and humidity.