Time does the work. We just pay attention.
The koji that grows in our Kyoto-strain chamber behaves differently from the koji in our Berlin studio. Same species. Different air, different mineral water, different ambient microbiology. The result is perceptibly, measurably distinct — and replicable nowhere else on earth.
We do not add flavour to our ferments. We create the conditions in which flavour is inevitable. Our role is patience, precision, and the discipline to intervene as little as possible.
The substrate — grain, legume, or protein — is prepared to precise water activity and temperature specifications. The culture is introduced. Conditions are set. We begin waiting and do not interfere.
Three days in. The culture is assessed by pH, visual growth, aroma, and Brix where applicable. Adjustments are made with the lightest possible hand — temperature ±0.5°C, humidity ±2%. No more.
Tasting begins. The first flavour arc becomes legible. We determine whether the ferment is developing on schedule, running early, or needs a longer window. Most need longer.
Months pass. Weekly aroma checks. Monthly tasting. The ferment is largely self-directing now. Our role is to ensure conditions remain stable and to resist the temptation to intervene unnecessarily.
There is no fixed endpoint. Completion is a sensory determination made by two pairs of hands independently. When both reach the same conclusion without communication, bottling begins. Not before.
We accept twelve bespoke fermentation commissions per year. Each is a 12–36 month project: we design the culture, manage the environment, monitor the maturation, and deliver the result. No two commissions are identical. None of the cultures are shared.