Umami is a Japanese word coined in 1908 by chemist Kikunae Ikeda. It combines two Japanese words: “umai,” meaning delicious, and “mi,” meaning taste. Ikeda created the term to describe a savory flavor he identified in kelp broth, a flavor that didn’t fit neatly into the four tastes (sweet, sour, salty, bitter) that Western science recognized at the time.
How Ikeda Identified a New Taste
Ikeda was a chemistry professor at Tokyo Imperial University who became curious about the rich, savory quality of dashi, the kelp-based broth foundational to Japanese cooking. He suspected the broth contained a taste compound that science hadn’t yet isolated. Working with dried kelp (konbu), he extracted and identified the active ingredient as the salt of glutamic acid, an amino acid naturally present in many foods. This compound, monosodium glutamate, was the source of the taste he named umami.
The discovery moved quickly from laboratory to kitchen. Ikeda patented a method for manufacturing monosodium glutamate, and a businessman named Saburosuke Suzuki acquired a joint share of the patent. Their company began production immediately and launched the seasoning commercially in Japan on May 20, 1909, under the brand name AJI-NO-MOTO, which roughly translates to “essence of taste.” That company eventually became the Ajinomoto Group, still one of the world’s largest producers of glutamate-based seasonings.
Why the West Took Decades to Accept It
Despite Ikeda’s findings, umami spent most of the 20th century unrecognized outside Japan. Western food science held firmly to the model of four basic tastes, and the idea that a fifth existed was met with skepticism. It wasn’t until 1985 that an international symposium in Hawaii brought researchers from multiple fields together to evaluate the evidence. A key presentation used multidimensional analysis of human taste perception to show that umami could not be explained by any combination of the four conventional tastes. It was genuinely distinct.
That symposium marked a turning point. Over the following decades, researchers identified specific receptors on the human tongue dedicated to detecting glutamate. In humans, these receptors are narrowly tuned to respond to glutamate specifically, unlike in mice where similar receptors respond to a broader range of amino acids. The existence of dedicated receptors was strong biological evidence that umami is a true basic taste, not just a flavor enhancement or a combination of other tastes.
Three Compounds Behind the Taste
Glutamate is the primary umami compound, but it’s not the only one. Japanese scientists later identified two others: one found in dried bonito (a type of fish) and another in dried shiitake mushrooms. All three compounds were discovered in Japan, which helps explain why the Japanese word for this taste became the global standard.
What makes umami particularly interesting in cooking is that these compounds amplify each other. Combining glutamate-rich ingredients with foods containing the other two compounds creates a synergistic effect, producing a savory intensity greater than either ingredient alone. This is why classic Japanese dashi, which combines kelp (glutamate) with dried bonito flakes, delivers such a deep, satisfying flavor. The same principle shows up in Italian cooking when Parmesan cheese meets tomato sauce, or in Chinese cuisine when mushrooms are paired with meat broth.
Umami Before the Word Existed
Humans have been chasing umami for thousands of years without having a name for it. The ancient Romans built an entire condiment industry around fish sauce, called garum, which was produced at fish-processing centers throughout the Mediterranean and traded over long distances. Archaeological evidence shows these operations were widespread, and processed fish was a significant element of Roman commerce. Garum gave Roman dishes a moderately salty, slightly fishy quality that combined synergistically with other foods to create what we now recognize as umami.
Because Roman fish sauce was made using the same methods and raw materials as modern fish sauce producers in Southeast Asia, the amino acid profiles of the two products are likely nearly identical. The Romans didn’t know they were dosing their meals with glutamate, but they understood the result: food that tasted richer and more satisfying. Similar fermented, glutamate-heavy condiments developed independently across cultures, from soy sauce in East Asia to Worcestershire sauce in England. The flavor was universal. It just needed a Japanese chemist to give it a name.
What Umami Actually Tastes Like
Umami is often described as savory, brothy, or meaty, but those descriptions only get partway there. It’s the deep, mouth-coating quality you taste in aged cheeses, ripe tomatoes, soy sauce, miso, and mushrooms. Unlike saltiness, which hits sharply and fades, umami spreads across the tongue and lingers. It tends to make you salivate and creates a sensation of fullness or roundness in a dish.
If you’ve ever added a splash of soy sauce or a spoonful of tomato paste to a soup and felt it suddenly come together, that’s umami at work. It doesn’t announce itself the way sugar or salt does. Instead, it amplifies and deepens other flavors, which is partly why it took so long for Western science to recognize it as a distinct taste rather than a general flavor enhancer.