What You Need to Know
Through multiple stages of smoking, drying, and mold fermentation (Aspergillus glaucus), proteins are broken down into free amino acids like inosinic acid (IMP), creating potent umami compounds. The shaving process exposes different surface areas of the hardened fish block, affecting dissolution rates.
The thickness and uniformity of flakes directly impact dashi extraction efficiency and flavor profile, with professional chefs maintaining collections of specialized planes for different flake sizes.
Key Parameters
Temperature
22°C
15°C - 30°C
Time
6-9 months
3 months - 2 years
Equipment
Traditional katsuobushi plane (kanna)Magnolia wood smoking chamberFermentation room with humidity control
Steps
- 1.
Ichiban dashi (Kaiseki cuisine): Primary umami source requiring precise flake thickness
- 2.
Okaka (Rice seasoning): Coarse shavings for texture contrast
The Science
Primary Reaction
Proteolysis