Before You Read The Taste of Time
The book starts with rotting fish. Here is why that matters.
The opening pages of The Taste of Time describe a fish, salted and buried in rice, slowly dissolving into something that the next month's village would eat with relief. Funa-zushi, the ancestor of all sushi, is at least a thousand years old in Japan and probably older. It is also, by ordinary modern standards, rotten. The fish has been allowed to undergo controlled bacterial action for months, sometimes years, until its flesh has the texture of soft cheese and a smell that most people who did not grow up with it find difficult on first encounter. I open the book here, and not with a cleaner more flattering ferment, because the discomfort is the argument. Civilization was built, in part, by people who learned to eat what should not have been edible — and who did so not as a delicacy but as a survival strategy that quietly succeeded for ten thousand years.
The premise the book asks you to hold while reading is this: fermentation is older than metalworking. The earliest archaeological evidence for deliberate human fermentation comes from a site in Jiahu, China, dated to around 7000 BCE — pottery residues showing a fermented beverage made from rice, honey, fruit, and grape, identified by Patrick McGovern and his team at the University of Pennsylvania Museum and published in the Proceedings of the National Academy of Sciences in 2004. That date sits roughly 1,500 years before the first identified copper smelting at Çatalhöyük and Plocnik. We have been intentionally rotting our food, on purpose, with skill, for longer than we have been working metal. The cookware came later than the contents. This rearrangement of priorities, which the book argues was the actual technological foundation of settled life, is what the early chapters are designed to make visible.
What you should expect from the first third of the book, then, is not a survey of techniques but a survival argument. Salt-curing, drying, smoking, lacto-fermentation, alcoholic fermentation, and acid preservation are presented in the order in which they likely emerged across various civilizations, and each is examined as a response to a structural problem: the calorie surplus of harvest cannot be eaten before it spoils, and the calorie deficit of winter cannot be survived without it. Every fermentation tradition I describe in those chapters — Korean jang, Japanese narezushi, Caucasian dairy fermentation, Andean chuño, the salt-fish economies of the North Atlantic, the bread-and-beer economies of Mesopotamia — answers the same problem. They differ in microorganism and substrate. They are identical in function. The book reads as cultural argument, not cookbook, because the techniques are the means and the argument is the end: settled human civilization is what happens when a population learns to store calories across seasons, and fermentation is the primary technology by which storage was made possible at scale.
This is also why the book diverges, structurally, from the work that most American and European readers will compare it to. Sandor Katz's Wild Fermentation, published in 2003 and updated several times since, is a great book and an important one. It changed the home-fermentation conversation in the English-speaking world and it remains the practical entry point I recommend to most beginners. Its frame, though, is technique-forward and lifestyle-adjacent: here is sauerkraut, here is kombucha, here is the cultural recovery of a craft that industrial food displaced. Mine is not that book. Mine starts from the question of why human beings developed these techniques across every continent before they were in contact with each other, and what that convergence reveals about the structure of pre-industrial life. Katz's book teaches you to make. The book I wrote tries to teach you to see. Both are useful. They are not substitutes.
The path that brought me to writing it is worth saying briefly, because it shapes the tone of the chapters that follow. I trained as a chef in Tokyo and Kyoto. I worked the line in restaurants where every condiment on the menu — the soy sauce, the miso, the rice vinegar, the mirin, the umeboshi, the various pickles, the cured fish — was a fermented product, often house-aged for months. I left that work in my early thirties to study food history at university, then spent the following decade in archives and farmhouses, talking to producers whose families had been making narezushi or doburoku or shoyu for four or five generations. The book is the result of that double life. It is written by someone who has tasted these things hot off a wooden press in winter, who can describe the chemistry, and who has also read the agricultural records that explain why a particular village in Shiga still makes a fish preserve that the rest of Japan stopped eating two centuries ago.
That double frame is what I think makes the book different from both pure history and pure cookery. The chapter on miso, for example, is not a tutorial in koji propagation, although it explains koji because the science is structurally necessary to the argument. It is an account of how a single fungus, Aspergillus oryzae, was domesticated in East Asia over roughly two thousand years, and how its industrial-scale management by Japanese miso and sake houses in the Edo period represents one of the earliest examples of pure-culture microbiology — preceding Pasteur's pure-culture work by approximately a hundred and fifty years. The miso paste in the back of your refrigerator is the descendant of an unbroken pure-culture biotechnology lineage older than germ theory. This is the kind of point the book tries to make. The recipes are not in it. The reason the recipes exist is.
A practical reading note. The book is structured in four parts: origins (preservation as survival), the great fermentation cultures (East Asia, the dairy belt, the Atlantic), industrial rupture (what changed when refrigeration and pasteurization arrived around 1880), and contemporary recovery (why home fermentation re-emerged in the early 2000s and what it means). Most readers find the second part the densest and the third part the most surprising. The chapter on industrial rupture — on how the introduction of mechanical refrigeration didn't just preserve food differently but quietly dismantled an entire layer of culinary technique that no longer needed to exist — is the chapter that has produced the most letters from readers since publication. I will not summarize that argument here. I will say that the book's logic up to that point is the necessary preparation for it.
If you are about to begin, I would suggest one thing. Before you open the first chapter, try a single ferment. A salt pickle, three days on the counter. Read Why Temperature Matters More Than Time in Fermentation if you want a primer on how the variable that matters most actually works. The reason is not that you need hands-on practice to follow the argument. It is that something happens in the brain when you have once eaten a vegetable that you allowed to rot, on purpose, in your own kitchen, and survived to find it improved. Some part of the survival argument the book is making becomes legible in a way that no chapter can fully convey. That single jar is, in its small way, the experiment the book is theorizing about. Begin there, and the rest of the reading goes faster.