What You Need to Know
Katsuobushi undergoes karebushi-style processing where filleted bonito (Katsuwonus pelamis) is repeatedly smoked and inoculated with Aspergillus glaucus mold to dehydrate and ferment. The final 'arabushi' or 'karebushi' blocks are shaved to maximize surface area for inosinic acid (IMP) release. The shaving process creates thin, wispy flakes that curl when exposed to moisture due to differential drying.
Used as a foundational umami source in dashi broth, the flakes dance atop hot foods like okonomiyaki due to convection currents. Their paper-thin cut allows near-instant hydration while retaining slight chewiness. Traditional Japanese kitchens use specialized katsuobushi kezuriki planes to achieve the ideal 0.01–0.03mm thickness.
Key Parameters
Temperature
°C - °C
Time
3 months
1 month (basic arabushi) - 6 months (premium honkarebushi)
Equipment
Steps
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The Science
Primary Reaction
Proteolysis