Brewing Mechanisms What Is Hi-ire? — A Clear Guide to Pasteurization and the Differences Between Namazake, Nama-chozō-shu, and Nama-zume-shu
What is hi-ire in sake brewing? Hi-ire is the process of heating sake to around 60–65°C to stop yeast and enzyme activity and stabilize quality. This article clearly explains the purpose of pasteurization and the differences between namazake, nama-chozō-shu, nama-zume-shu, and standard sake.