Discovering Umami – A History of the Fifth Flavor

The story of where umami comes from, what it tastes like, and how it was discovered is a journey wrapped up in culture and chemistry.
Dashi and dried shiitake mushrooms

By Mark Hinds | Updated February 23, 2024

Almost everyone loves the deep savory flavor in soups and stews, the taste of aged parmesan, and the way slow-cured ham lingers on the palate. What ties all these foods together is they are rich in umami. The story of where umami comes from, what it tastes like, and how it was discovered is a journey wrapped up in culture and chemistry.

Discovering Umami

The story starts with a chemist at Tokyo Imperial University named Dr. Kikunae Ikeda, who thought there was a quality in Dashi, a clear stock essential to Japanese cooking, that was distinct from the other four basic tastes (sweet, salty, bitter, sour).  He thought it should be considered a basic taste because it couldn’t be produced by any combination of the other four. As Ikeda said, “it is usually so faint and overshadowed by other stronger tastes that it is often difficult to recognize it unless attention is specifically directed towards it.”

Kikunae Ikeda
Dr. Kikunae Ikeda the discoverer of Umami

To understand where this taste came from, Dr. Ikeda started exploring the primary ingredient in Dashi, a type of kelp called kombu. To figure out what made Dashi so delicious, he worked for months conducting a chemical analysis that involved boiling kombu down to a tarry like substance and using an evaporation technique to isolate specific compounds.

Ikeda knew he had found the right thing when he tried some small crystals, and they tasted like a sour Dashi.  What Ikeda had found was glutamate, which is an amino acid that gives Dashi its rich umami flavor.  What’s interesting when you taste glutamate by itself is how long the taste lingers on the palate.

The name umami, which is often defined as a ‘pleasant savory taste,’ comes from the Japanese words umai, which is used to say something is pleasant or delicious and the word mi, which means ‘essence,’ ‘essential nature,’ or ‘taste.’

According to Mouritsen and Styrbaek, in their book Umami: Unlocking the Secrets of the Fifth Taste, Ikeda never intended for umami to be the permanent name for his discovery but instead suggested it as a temporary name until something better could be found. 

Something both ironic and justified, considering how long it took the rest of the scientific community to acknowledge umami as a basic taste and because when they finally did, they named umami in Ikeda’s honor.

Why Did It Take So Long to Find Umami?

The real question, of course, is why it took so long to find umami; it wasn’t as if people developed the ability to taste umami after Ikeda’s experiments or when scientists finally discovered umami receptors on our tongues ninety years later.

Ever since Aristotle’s time, there have been four accepted tastes sweet, sour, bitter, and salty in Western cuisine. As the science of taste has evolved, scientists have been able to identify taste receptors on our tongues associated with each of the basic tastes.

A part of the reason it took so long for scientists to recognize umami as a basic flavor is because the first taste receptors specific to umami weren’t discovered until 2000. Since then, several more receptors have been discovered that react to different types of amino acids that produce different degrees of umami.

Another reason why it has taken longer for umami to be recognized in Western cuisine is even though the flavor has been sought after for thousands of years, with a history stretching from the Roman’s love of a fermented fish sauce called garum all the way to Americans’ predilection for ketchup, there still isn’t a single ingredient or dish that embodies umami in Western cuisine in the same way Dashi does in Japanese cuisine.

Can you guess which one is salt, which one is sugar, & which one is MSG?

Think about it, when someone wants to know what salty tastes like they can have a spoonful of salt, sweet try some sugar, sour here’s a lemon, bitter drink a really hoppy beer.  Ask someone for a bite of umami and you’re likely to get a blank stare. 

One of the things holding umami back is that people usually describe a flavor by using an analogy or by using the flavor’s name; for example when someone describes something sweet they say it tastes sugary when something is really sour people say it’s like sucking on a lemon – something umami doesn’t currently have.

Mouritsen and Styrbaek think a part of the reason for umami’s earlier recognition in Japanese cuisine is that the spread of Zen Buddhism in the 1300s helped deeply ingrain the search for umami through the monks’ practice of a strict form of vegetarianism that forbids all animal products.  This increased the importance of kombu, the base for Shojin Dashi, which has been described as the ultimate vegetarian soup stock and a true umami bomb.

The other piece of the umami puzzle is that while there are lots of ingredients that have differing levels of umami flavor in them: asparagus, tomatoes, shiitake mushrooms, parmesan cheese, pork, etc.

The best way to bring umami flavors out is to combine ingredients with different chemical compositions, often referred to as umami’s synergistic effect and to use cooking methods such as drying, curing, or fermenting that can bring out more of an ingredient’s umami flavor.

An easy way to learn what is umami flavor and how to use it to improve your cooking is to read Understanding Umami Flavor with A Simple Taste Test. The taste test uses vegetable broth along with a little MSG Seasoning and Umami Powder

Umami and MSG

One last thing worth noting is the connection between umami and Monosodium Glutamate (MSG).  MSG, which may be the most maligned seasoning on the planet, was created by Dr. Ikeda as a way to add umami flavor to food.

MSG is glutamic acid derived by fermenting corn, sugar beets, or similar agricultural products and is essentially what Ikeda found in the lab. The company Ikeda started to manufacture MSG, Ajinomoto, is still the largest producer in the world.

Using MSG as a seasoning, similar to salt or pepper is an easy and safe way to add flavor to the food you’re cooking. You can learn more about umami and its history with MSG in Everything You Need to Know About Umami.

Mark is an experienced food writer, recipe developer, and photographer who is also Umami’s publisher and CEO. A passionate cook who loves to cook for friends, he can often be found in the kitchen or by the grill testing new recipes.

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  1. John A. Long

    So, what is the fifth flavor? And what is it the fifth flavor of?? I need more details.

    1. Mark Hinds

      Umami is considered the fifth flavor with the other four being sweet, salty, sour, and bitter. You can learn more in Everything You Need to Know About Umami.