TOKYO, JAPAN TIME00:00:00
DOJO

FROM A SMALL TOWN
IN THE JAPANESE MOUNTAINS

The family and the Dojo crew at the brewery

蔵のはじまり

THE BREWERY

The story

In 1902, a young koji maker opened a small workshop in Kamikawa, a mountain town about two hours north of Tokyo. He was not building a company. The farmers around him brought in their own soybeans and wheat after harvest and asked him to turn it into soy sauce and miso for their families. He did. They still have a word for that arrangement. Goyogura, roughly the brewery that makes what it is asked to make.

Five generations later the same family is still there. Today it is run by two sisters, and Mami is the one in charge. Everything in the brewhouse is done by hand. The koji is turned by hand, the mash is stirred by hand, and the people who make your soy sauce will feed you lunch afterward.

The Mountain

At the edge of town stands a shrine roughly 1,900 years old. It has no main hall and no statue inside it. Only three shrines left in Japan are built this way. There is nothing indoors to bow to, so the worship hall simply opens toward the peak behind it. The mountain is what people come to pray to.

For nineteen centuries this valley has treated the mountain as something alive and owed. It sets the weather, the harvest, and the water, and the town has arranged itself around that for longer than most countries have existed.

The brewery keeps its own version of the practice. Every morning someone drives up the mountain with large containers, fills them at the spring near the top, and carries the water back down to the brewhouse. Every day, in every season, before anything else happens. There is no pipeline and no tap. If the water does not come down the mountain, no soy sauce gets made that day.

That water is why this shoyu tastes clean instead of harsh. It is soft, it comes out of rock and forest, and it is the largest single ingredient in the bottle.

The last barrels

A century and a half ago, every drop of soy sauce in Japan was fermented in giant cedar barrels called kioke. Today less than one percent is. Roughly 900 of Japan's 1,000 soy sauce makers moved to steel and plastic tanks because tanks are cheaper, faster, and easier to clean. A cedar barrel lasts 100 to 150 years, and there are almost no coopers left who know how to build a new one.

This family never switched. Their barrels are older than anyone working in the room, and the yeast and bacteria living in that wood exist nowhere else on earth. When barrels like these go, that flavor goes with them.

Mami and Charles in a soybean field below the brewery mountains

醸造

THE PROCESS

Four ingredients. Organic soybeans, organic wheat, sea salt, and mountain spring water.

It starts in the soil. The soybeans and wheat are grown in Japan with no pesticides and no chemical fertilizer, some of it on the family's own organic farm down the road. That farm feeds its fields with compost and crop rotation, and it trains neighboring growers to do the same. Certified organic in Japan and in the United States. Industrial soy sauce usually skips whole beans altogether and runs on defatted meal left over from oil processing.

Koji. The beans are soaked and steamed, the wheat is roasted and cracked, and the two are mixed and seeded with koji spores. Three days in a warm room, turned by hand to keep the growth even, and it comes out bound together under a pale green bloom. This is the engine of the whole process. Koji makes the enzymes that spend the next two years taking the batch apart.

Moromi. The koji is folded into brine made from sea salt and spring water. The mash that results is called moromi, and the brewery calls it the soul of the soy sauce.

The barrels. The moromi is loaded into cedar kioke taller than a person. Nothing is added to start fermentation. The microbes living in the wood handle it, and every barrel has its own population. Early on the mash is stirred with a long wooden pole to work in oxygen. After that it is mostly left alone.

Two years. Fermentation here runs on the weather, not a thermostat. Summer pushes it hard. Winter slows it almost to a stop and rounds it out. Then it starts over. Enzymes spend that whole time breaking soybean protein into amino acids, which is where umami comes from, and wheat starch into sugar, which is where the sweetness and aroma come from. The mash darkens from oatmeal to deep mahogany and picks up more than 300 aroma compounds. You cannot force that with heat or add it back in later.

The press. The finished mash is wrapped in cloth, stacked in layers, and pressed slowly under gradual weight. The liquid rests until it settles, and the clear layer is drawn off and bottled. The spent mash goes back to the farm. Nothing else goes in. No caramel color, no corn syrup, no preservatives.

Two years to make. Months to cross the ocean. A few seconds to taste why it was worth it.

How most soy sauce in America is made

Most of the soy sauce sold in America is made in America, and the fast version barely ferments at all. Defatted soybean meal gets broken down with acid or heat in a stainless steel tank. Some of it is finished in a few months. Some of it is finished in a few days. Then caramel coloring goes in to make it look aged, corn syrup goes in to round out the taste, and preservatives go in to keep it stable on a shelf. The soybeans are conventionally farmed. The label usually looks Japanese.

Same word on the front. Different product in the bottle.

Chaz stirring a cedar vat of moromi at the brewery

創業者

THE FOUNDER

Chaz has been putting soy sauce on everything his whole life.

One night he ordered sushi for takeout, tore open one of those little plastic packets, and spilled the whole thing down his shirt. Annoyed, he went to the fridge, grabbed the brand he had been buying since he was a kid, and read the back of the bottle for the first time.

Made in the USA. Wisconsin.

Then he read the ingredients and found preservatives in a product that should only need four things.

He started digging, and the pattern held. Most of the leading soy sauce brands in America are made in America, with added ingredients that have nothing to do with soy sauce, from conventionally farmed soybeans, in packaging designed to make you assume it came from Asia.

So he ordered a bottle of the real thing, brewed in Japan the traditional way. It tasted like a completely different ingredient. That was the first time he understood what umami actually means.

He booked a solo flight to Japan to find the source. He ended up in a mountain town in Saitama, in a small brewery run by a woman named Mami, standing next to cedar barrels older than his grandparents. DOJO exists to give her soy sauce a home here.

His mission has not changed since that first bottle. Real Japanese soy sauce should not be a thing you have to fly to Japan to understand. Anyone should be able to find it, open it, and taste for themselves what it is supposed to be.

Traditional brewing in a cedar barrel

道場

DOJO MEANING

A dojo is a place of practice. It is where a craft is studied, repeated, corrected, and handed from one person to the next. The word points at more than the room. Mastery there is never assumed. It is earned slowly, through repetition, restraint, and attention to detail.

That is how this soy sauce is made. It cannot be rushed. It depends on the brewer's knowledge, the quality of what goes in, the environment around the barrels, and the patience to let flavor arrive on its own. The techniques have been refined across five generations, each one learning from the one before it and continuing to sharpen the craft. By that definition the brewery is already a dojo, which is why the name is less a metaphor than a description.

DOJO is about respecting the people and the practice behind the product, and giving that craft a bigger table to sit at.