What You Need to Know
Combines enzymatic fermentation (katsuobushi's kōji mold Aspergillus glaucus) with repeated smoking (hardwood combustion) and solar drying to concentrate inosinic acid (IMP) and amino acids. Final moisture <20% enables preservation.
Forms the umami backbone of dashi broth, with applications from soups to sauces where deep savory notes are needed.
Key Parameters
Temperature
70°C
60°C - 80°C
Time
1 month
2 weeks - 6 months
Equipment
Traditional: Honkarebushi drying boxesModern: Controlled smokehouses with oak/charrwood
Steps
- 1.
Ichiban-dashi (Kaiseki cuisine): Primary umami source (with kombu)
- 2.
Okaka rice topping (Japanese home cooking): Texture contrast via shaving thickness
The Science
Primary Reaction
Maillard reaction + pyrolysis during smoking