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Katsuobushi

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description Katsuobushi Overview

Katsuobushi is a traditional Japanese food product made from skipjack tuna, specifically *Katsuwonus pelamis*, which is filleted, simmered, smoked, and fermented. During the fermentation process, the fish blocks are repeatedly treated with a specific mold culture to remove moisture, resulting in an extremely hard, wood-like texture. These dried blocks are then shaved into thin flakes, known as kezuribushi, which serve as a primary ingredient in the preparation of dashi broth. It provides a distinct umami flavor and is a foundational component of many Japanese soups, sauces, and seasonings.

help Katsuobushi FAQ

What type of fish is used to make katsuobushi?

Katsuobushi is a traditional Japanese food product made specifically from skipjack tuna, scientifically known as *Katsuwonus pelamis*. The fish is filleted, simmered, smoked, and then carefully fermented.

How is katsuobushi fermented?

During the traditional fermentation process, the hard, smoked fish blocks are repeatedly treated with a specific mold culture (*Aspergillus glaucus*). This process is designed to remove moisture and preserve the fish while concentrating its umami flavor.

What is katsuobushi used for in Japanese cooking?

Katsuobushi is most commonly shaved into thin flakes and used to make *dashi*, a foundational Japanese soup stock. These bonito flakes are also heavily used as a savory topping for various dishes, such as okonomiyaki and takoyaki.

Why does katsuobushi look like a piece of wood?

The repeated cycles of smoking and mold fermentation remove almost all the moisture from the fish blocks. This makes the finished katsuobushi incredibly hard and dry, giving it a texture and appearance very similar to a block of driftwood.

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