A Historic Soy Sauce Brewery Founded in 1688 Works to Preserve the 1% 'Wooden Barrel Culture' for the Future—Public Viewing of Barrel Replacement with Master Cooper (Starting April 16 for 10 Days); Press Coverage and Filming Available

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Shibanuma Soy Sauce Brewing Co., Ltd. is set to replace its traditional wooden brewing barrels starting April 16, 2026, to help preserve the rare 'wooden barrel fermentation' method that accounts for only 1% of domestic production. The company is opening the process to the media and public to highlight the importance of this vanishing craft and the work of the few remaining master coopers.