The concentrated simmering sauce "徳造丸監修 秘伝の煮汁," jointly developed by 徳造丸 and エバラ食品工業, was launched initially in the Shizuoka area, offering a way to recreate the taste of simmered alfonsino at home.
This simmering sauce was created with the character of Izu-Inatori in mind, with the sweetness of mirin and the aroma of burdock and ginger designed to enhance the umami of fish. It was jointly developed by 徳造丸 and エバラ食品工業 and launched initially in the Shizuoka area on 10 September 2026.
The base flavor is based on the simmering sauce used at 徳造丸's main restaurant and was commercialized for home use. By simply diluting it with water at a 1:1 ratio and simmering, users are said to be able to recreate a professional taste. Founded in 1926, 徳造丸 is a company rooted in a fishing town and aims to preserve local cuisine and revitalize the region.
The product is presented as a versatile seasoning that can be used not only for simmered alfonsino but also for cooking everyday fish and simmered dishes in general, positioning it as an entry point for experiencing Izu's regional food culture at home.
As a track record, following initiatives before and after the launch, cumulative sales had exceeded 2 million bottles as of October 2025. Sales through e-commerce sites and awards including regional certifications are also cited.