Naturally brewed two years in a 190-year stone brewery in Gunma, then smoked over sakura wood. Deep umami, a clean and lingering smokiness. No additives.
Aritaya has been making soy sauce in Annaka, Gunma Prefecture since 1832. The same stone warehouse. The same building. Nearly two centuries of endemic koji microbes in the walls — that's not background detail. It's the reason the shoyu tastes the way it does.
The base is simple: soybeans, wheat, salt, water. It ferments for two years in that warehouse without temperature control, moving at the pace of Gunma's four seasons — slow in winter, active in summer. Only about 10% of Japanese soy sauce makers still use this method. The result is a moromi that builds genuine depth, not manufactured complexity.
After aging, the shoyu enters a German-made smokehouse. Sakura wood chips. One pass. The smoke is there — present and identifiable — but it doesn't take over. Aritaya calls this Ibushi Bishio: their term for a new category at the intersection of Eastern fermentation and Western smoking. They hold the Japanese patent for the process.
The flavor is close to katsuobushi dashi shoyu — that same smoky, savory register, clean and aromatic. Notes of hay, light cocoa, and coffee on the nose. Balanced salinity. A long finish that closes quietly. Nothing aggressive.
Ayako, Umami Curator at The House of Umami, visited the Aritaya brewery in Gunma and walked through the stone warehouse herself. It's a small operation — modest in scale, but the kind of place where the age of the building is visible in every wall. She came back convinced this was a shoyu worth carrying.
This is a finishing shoyu. A few drops over protein off the heat. A brief dip for raw fish. A deglaze that needs depth without volume. It works equally well in a French kitchen, an Italian pantry, or across the pass at a Japanese counter.
