Umami Discovery and Science — Kikunae Ikeda's Legacy
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.