Description
Traditional Japanese method using sand to regulate moisture and microbial activity during vegetable fermentation.
Technical
Anaerobic conditions created by sand pressure promote Lactobacillus dominance while inhibiting mold growth. The sand matrix maintains 70-80% relative humidity, allowing gradual lactic acid production (typically reaching 1.2-1.8% acidity).
Culinary Significance
Produces crisp, umami-rich pickles with distinctive minerality from the sand contact, traditionally made with turnips (kabura-zushi) or nozawana greens.
Science
Primary Reaction
C6H12O6 → 2CH3CHOHCOOH (homolactic fermentation)
Parameters
Temperature
15°C optimal
10°C to 20°C range
Temperature range for optimal lactic acid fermentation
Time
2 weeks
3 days – 6 weeks
Equipment
Large containerSandWeight