Tokyo, Japan — Kikunae Ikeda's discovery, 1908; Tokyo Imperial University
Kikunae Ikeda, a chemistry professor at Tokyo Imperial University, identified and named umami (旨味, literally 'delicious taste') in 1908 after noticing that dashi made from kombu had a distinct savoury quality not explainable by the four recognised tastes (sweet, sour, salty, bitter). He isolated the compound responsible: glutamic acid (glutamate), which he found in extremely high concentrations in kombu. Ikeda subsequently developed monosodium glutamate (MSG, Ajinomoto) as a seasoning to deliver this taste in concentrated form — founding what became the Ajinomoto company. The subsequent century of umami science identified: inosinic acid (IMP, from katsuobushi, dried fish, and meat) and guanylic acid (GMP, from shiitake) as additional umami compounds; the synergistic amplification between glutamate + IMP (the scientific explanation for why kombu + katsuobushi dashi is so satisfying); the umami receptors T1R1/T1R3 on the human tongue; and the global validation of umami as the fifth basic taste. Japanese cuisine's historical intuitive use of umami synergy is now understood biochemically.
Umami is the scientific explanation for why Japanese dashi-based cooking tastes so satisfying — the synergistic combination of glutamate and inosinate creates the characteristic depth that Western cuisines describe as 'indescribable savoury richness'
Glutamate (from kombu, tomatoes, parmesan, anchovies, miso) + IMP (from katsuobushi, meat, sardines) = synergistic umami amplification at 8x perceived intensity of either alone; GMP from dried shiitake adds a third synergistic partner; umami acts as a flavour amplifier — it doesn't have a strong taste alone but intensifies all flavours in a dish; MSG is chemically identical to naturally-occurring glutamate — the food safety concerns around MSG are not supported by controlled research.
The three-way umami synergy in professional Japanese cooking: kombu (glutamate) + katsuobushi (IMP) + dried shiitake (GMP) creates the most intensely perceived umami possible in a natural dashi — this is why restaurant-level dashi uses all three in proportional amounts rather than any single ingredient; MSG used as a seasoning is identical in effect to using a concentration of the umami compound — the stigma around it has no chemical basis; home test: taste kombu dashi alone, katsuobushi dashi alone, then the combined dashi — the third will taste dramatically more savoury than the first two added together.
Treating MSG as categorically different from natural glutamate sources (it is the same compound — the distinction is cultural not scientific); trying to identify umami as a discrete detectable taste like salt or sweet (umami works more as a body and depth enhancer than a primary flavour note); overlooking non-Japanese sources of umami synergy (tomato + anchovy in pasta e fagioli; parmesan rind + meat in bolognese) — these are the same biochemical principles.
Japanese Food Culture — Naomichi Ishige