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katsuobushi

Katsuobushi: The Story of Amazing Bonito Flakes

Karina Ikedo

Karina Ikedo

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A plate of katsuobushi flakes, with a whole version in the back.

Japanese cuisine has a long list of seasonings and flavorful ingredients that are key to making their dishes delectable. Among these ingredients, katsuobushi (dried bonito flakes) is slowly becoming a hit outside Japan. But they smoke and dry bonito fish over several months and then shave it into flakes. While the reference to school supplies may not be the most appetizing, these flakes have a warm, smoky, umami flavor.

This unique Japanese ingredient adds flavor to multiple Japanese dishes, including a zesty rice topping. Learn about katsuobushi, where it’s from, and the delicious dishes that feature this one-of-a-kind ingredient.

What is katsuobushi?

Katsuobushi, or bonito flakes, are dried shavings of katsuo (skipjack tuna or bonito). They come from a tuna-like Pacific fish, which producers dry, ferment to wood-like hardness, and then smoke. These flakes have a smoky, savory taste that serves as a great accent for many Japanese dishes. Because dried bonito has a strong umami (savory) taste, it is perfect for making dashi (fish broth).

A bowl of katsuobushi.
They are also known as bonito flakes. Image via Shutterstock

You can also use it as is, sprinkling it on simple vegetables to instantly give them a deeper flavor.
What’s more unique is the method of making bonito flakes. Producers must smoke the skipjack tuna fish for at least five to six hours in one session. Then, they let them rest for a day. They repeat the smoking and resting cycle 12 to 15 times!

Where is it from?

Katsuobushi has its roots entirely in Japan. One of the legends about its origins explains how one part of its production came to be. A katsuobushi dealer found some arabushi (dried skipjack tuna) growing mold in his warehouse and didn’t throw it away. He tried it and discovered that the mold only intensified its flavor! 

Whole katsuobushi
The main ingredient is smoked skipjack tuna. Image via Shutterstock

This type of bonito flakes was first produced in Makurazaki in Kagoshima Prefecture in the 1700s. The manual process requires knowledge of sophisticated fish-cutting skills and has been kept alive by dedicated artisans.

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What dishes do people use katsuobushi for?

Okaka

Okaka onigiri with bonito flakes inside.
Okaka onigiri has katsuobushi inside. Image via Shutterstock

Okaka, or chopped bonito flakes mixed with soy sauce, is a popular onigiri (rice ball) filling and rice topping. The flavor can be as light or salty as you wish by simply adjusting the amount of Japanese soy sauce. The best thing about it is that it takes less than two minutes to make. It’s easy to make and perfect for a quick lunch or snack. Give it a try, and enjoy every bite of these delicious rice balls!

Takoyaki and Okonomiyaki

People also use katsuobushi as a topping for okonomiyaki (a savory Japanese pancake) and takoyaki (grilled octopus balls). They make takoyaki with chewy octopus and a light, airy batter, smother it in sauce, and top it with wiggling bonito flakes.

Okonomiyaki with bonito flakes on top.
These bonito flakes add an umami taste to most Japanese foods! Image via Shutterstock

Meanwhile, okonomiyaki is a delicious, savory Japanese treat served in a pancake shape with various toppings and sauces. Adding a few katsuobushi flakes on top of your okonomiyaki gives it an umami flavor that greatly enhances the pancake. These flakes make your takoyaki and okonomiyaki look like they’re dancing! They are delicate, paper-thin, shaved dried fish that wave from the hot steam.

Ramen and Soba

You’ll be amazed to find different types of ramen and soba with this ingredient as a topping or the soup’s broth seasoning. It’s because any flavorful Japanese soup starts with dashi, made from a combination of katsuobushi and kombu (dried kelp). 

Katsuobushi on top of soba.
They add it to all kinds of noodles. Image via Shutterstock

Sodium-rich, it magically lifts any dish and makes some of the best ramen noodles. Spoon a little over ramen for a beautiful yet flavorful comfort bowl. Shoyu (soy sauce) ramen uses bonito flakes as a base. Meanwhile, katsuo (bonito) ramen uses plenty of katsuobushi as a base and topping for a rich umami flavor and aroma.

Why should I try katsuobushi?

Katsuobushi is an essential ingredient in Japanese cuisine. People use bonito flakes to make stock and as a topping on everything from noodles to rice. Their intense umami flavor enhances any dish they are added to. Beyond their flavor, bonito flakes are packed with essential nutrients, making them a great staple in the pantry. It is also rich in protein, amino acids, and iron.

Tofu with katsuobushi on top.
Have you ever had katsuobushi before? Image via Shutterstock

Regularly consuming this superfood may help improve brain function, lower blood pressure, and boost metabolism. It even promotes collagen production, giving you a firmer and more moisturized complexion. If you want to feel great and look good, katsuobushi might be your perfect ingredient! Have you tried katsuobushi before? Do you have a favorite dish featuring this one-of-a-kind ingredient? Let us know in the comments below!

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