Description
Optimal extraction of glutamates and nucleotides from kombu and katsuobushi creates synergistic umami.
Technical
Cold-water extraction of glutamic acid from kombu (Laminaria japonica) followed by heat-activated inosinic acid release from katsuobushi (smoked, fermented skipjack tuna) through enzymatic conversion of IMP.
Culinary Significance
Forms the flavor foundation for clear soups, nimono, and premium sauces where delicate umami is paramount.
Science
Primary Reaction
Maillard Reaction
Parameters
Temperature
70°C optimal
65°C to 75°C range
Time
3min
2min – 5min
Equipment
Donabe (earthenware pot)Ami shakushi (perforated ladle)Housou cloth