Where to buy
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GFA Evaluation
Shoyu brewed by Yamasa Corporation, Choshi, Chiba Prefecture, Japan — in documented continuous operation since 1645. USDA Organic and JAS Organic certified. Organic whole soybeans and wheat. 12-month natural fermentation.
USDA Organic and JAS Organic certified. Named brewery: Yamasa, Choshi. 12-month natural fermentation stated. Ingredients: organic whole soybeans, organic wheat, water, salt. No artificial colour, caramel, or preservatives.
Yamasa is one of Japan's two largest historic soy sauce producers. Long-established contracting relationships with organic soybean growers. No third-party Fairtrade certification.
Yamasa's documented operation since 1645 is verifiable through Japanese commercial records. 12-month fermentation is substantiated by stated production process. Choshi, Chiba is historically Japan's primary shoyu production region, alongside Noda.