What is Warisu?

Warisu refers to the vinegar when doing Sujime.

The fish is first washed in water, then soaked in vinegar. When working with blue-backed fish, the smell of the fish’s fat is removed from the surface with vinegar that has been used once before (and thus has a low acidity). This is called Suarai. When preparing fish with Sujime, cooled Warisu is used, made either with a 10 to 3 ratio of vinegar to ice, or the same ratio of vinegar to cold water. Vinegar with a high acidity that hasn’t been cut with water only soaks the surface of the fish (denaturing it) and the vinegar does not penetrate to the inside. In addition, if the temperature of vinegar is high, such as during summer, the skin and body of the fish soften. That’s why the vinegar is diluted (acidity is between ph 3.3 and ph 3.7) and used as chilled Warisu. After the Sujime of the topping is finished, it is important to place it in the refrigerator and allow the meat to mature slowly. For fish with strong fat, that fat oxidizes faster than the meat can mature, so it must be done very carefully.

Related contents: TYPES OF VINEGAR

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We hope this information will be helpful.

Revision date: November 23, 2021


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