What Is Koji? The Mould That Makes Sake Possible
Koji is the tame mold that turns rice starch into sugar so yeast can make sake. Here is what koji actually does, how it is grown, and why brewers rank it first.
Koji is the tame mold that turns rice starch into sugar so yeast can make sake. Here is what koji actually does, how it is grown, and why brewers rank it first.
How is sake made? A clear, five-step walk from polished rice to the glass — and the one step, parallel fermentation, that sets sake apart from wine and beer.
Umami is the savory fifth taste, and sake is unusually full of it. Here is the amino-acid science behind why, and why glutamate alone is not the whole story.
Sake alcohol content reaches 18-20% naturally, the highest of any brewed drink. Here is how parallel fermentation gets there without a still.
Juyondai sake from Yamagata’s Takagi Shuzo reshaped 1990s sake fashion, yet tiny output and allocation keep most bottles out of reach today.
Aramasa sake traces back to Kyokai No. 6 yeast, isolated in Akita in 1930. See how one brewery’s all-kimoto revival compares to natural wine.
Dassai sake traces back to a nearly bankrupt Yamaguchi brewery that dropped everyday sake for junmai daiginjo only. Here is the real story behind the name.
Muroka genshu meaning, explained precisely: muroka skips charcoal filtering, genshu skips dilution, nigori keeps rice solids. Three words, three separate choices.
Sake Meter Value (nihonshu-do) measures density, not sweetness. Learn how acidity and amino acids explain why two sakes with the same SMV can taste different.
Special designation sake means eight legal tokutei meisho-shu styles set by Japan’s National Tax Agency, defined by method — not by rank. Here is the breakdown.