Umami

The taste was identified in 1908 by chemist Kikunae Ikeda of Tokyo Imperial University. Puzzled by why a bowl of dashi (出汁), the kelp-and-bonito stock at the heart of Japanese cooking, tasted so satisfying without being sweet, salty, sour, or bitter, he isolated the compound responsible: glutamate. He named the sensation umami and patented monosodium glutamate (MSG) to deliver it; the company that commercialised it, Ajinomoto, still bears a name meaning "essence of taste." For decades Western science treated umami as a curiosity, until by the 2000s researchers confirmed dedicated glutamate receptors on the tongue and umami took its place as a genuine fifth taste.

Umami is built from three compounds: glutamate, in kelp (昆布, konbu), tomatoes, and aged cheeses; inosinate, in dried bonito flakes (鰹節, katsuobushi), meat, and fish; and guanylate, in dried shiitake mushrooms. The magic is synergy: combine a glutamate source with an inosinate source and the perceived umami multiplies far beyond the sum of its parts. That is the whole logic of dashi: kelp plus bonito. You can taste it at home with one of the simplest recipes in the world: steep a strip of konbu in water, warm it, lift out the kelp before it boils, add a handful of bonito flakes, wait a minute, and strain. The pale gold liquid that results is the savoury backbone of miso soup and countless simmered dishes. The same trick runs through cuisines everywhere: tomato + parmesan, ham + beans, mushrooms + meat.

For Japanese cooking, umami is less a trend than a philosophy. Traditional washoku (和食), itself recognised by UNESCO in 2013, leans on this deep savour to season lightly, letting each ingredient show through rather than masking it with fat or heavy spice.