Where Did Sake Begin? Rice, Koji, and the Origins of Japan’s Brew

Cook rice and you get a meal. But how does the same grain become sake?

Following that question takes us beyond the search for a first inventor. It leads to old records, the work of microorganisms, and generations of people learning how to guide a transformation they could not see directly.

One drink, more than one beginning

Here, sake means Japan’s brewed rice drink, also called nihonshu. Its background belongs to a wider Asian history of rice cultivation and rice-based brewing. But the beginnings of rice alcohol and the development of the sake we recognize today are different questions.

A useful starting point is the Japan Sake and Shochu Makers Association’s historical overview, which traces a long succession of changes rather than a single finished invention.

What an old account can tell us

The precise beginning of sake-making in Japan is unknown. One clue appears in the Harima no Kuni Fudoki, compiled in the early eighth century: an account describes mold growing on rice offered to a deity, followed by brewing and a feast. A National Tax College study of sake history (Japanese) discusses it as early written evidence of brewing with rice koji.

An account of brewing is not an invention certificate. The date of a text cannot tell us when someone first made rice alcohol, and an ancient drink need not have tasted like today’s sake.

The missing link between rice and alcohol

The important word is koji. Rice contains starch; yeast needs sugars it can use. Koji is rice on which a particular mold has been cultivated. The National Research Institute of Brewing’s introduction shows how koji, steamed rice, water, and a yeast starter enter sake production.

• Koji’s enzymes break rice starch down into sugars.
• Yeast converts sugars into alcohol and carbon dioxide.

In the fermentation mash, these two processes proceed alongside one another. This is called parallel multiple fermentation. They are distinct jobs, taking place in the same developing mixture—not two names for the same process. Japan’s Ministry of Agriculture, Forestry and Fisheries explains the distinction (Japanese).

A craft that kept changing

Medieval shrines and Buddhist temples were among the places where brewing techniques developed. Methods included using polished rice for both koji and the rice added to the mash, and adding ingredients in stages. The JSS and NRIB’s A Comprehensive Guide to Japanese Sake, chapter 10 describes these developments.

Seen this way, tradition is more interesting than a recipe that never changed. It is a history of observing, adjusting, and passing skills on. A cup can hold the result of a great deal of practical thinking.

From sake to Ikkyu, Komachi, and science fiction

That meeting of everyday culture and hidden processes is also an inviting way into a story. In the novel BOZWARZ, the protagonist Ikkyu and the character Komachi are both portrayed as sake lovers.

If those names have caught your attention, explore our articles on Ikkyū Sōjun, the eccentric Zen monk and Ono no Komachi, beauty, and impermanence.

And if you would like to follow them into a novel where Japanese culture meets science fiction, read BOZWARZ on Kindle. A familiar drink might be your doorway into an unfamiliar world.