What You Need to Know
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).
Produces crisp, umami-rich pickles with distinctive minerality from the sand contact, traditionally made with turnips (kabura-zushi) or nozawana greens.
Key Parameters
Temperature
15°C
10°C - 20°C
Time
2 weeks
3 days - 6 weeks
Equipment
Large containerSandWeightCheesecloth or breathable cloth
Steps
- 1.
Sunki-zuke (Nagano): Creates signature crunchy texture and balanced acidity
The Science
Primary Reaction
C6H12O6 → 2CH3CHOHCOOH (homolactic fermentation)