What is Chirimen-jako (Dried Shirasu)?
Chirimen-jako refers to juvenile sardines (shirasu) that are carefully rinsed, boiled, and then dried in the sun or using other drying methods. Because they can be eaten whole—from head to tail—they are widely appreciated as a highly nutritious and health-friendly food. The unique name chirimen is said to originate from the way the sardines are laid out and sun-dried in bamboo trays, resembling chirimen silk fabric (though there are several theories about this origin). With their clean, mild flavor and pleasantly firm texture, chirimen-jako is extremely versatile. Whether used as a topping, in pasta, or as an ingredient in fried rice, they complement a wide variety of dishes. Incorporating chirimen-jako into your daily meals is a simple way to support a healthier, more balanced diet.
About the Nutritional Value of Chirimen-jako
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High in Protein, Low in Calories
Chirimen-jako contains about 1.2 times more protein than soybeans but with only half the calories. Protein plays a key role in building muscle and boosting immunity, making it especially important for growing children. It is also extremely low in carbohydrates—only about 0.2g per 100g—making it an excellent choice for low-carb or high-protein diets, including those focused on weight control.
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Rich in Calcium and Vitamin D
Chirimen-jako provides about five times more calcium than milk. Calcium is essential for developing strong bones and teeth during childhood, and even after the age of 20, bone density gradually declines, making calcium intake equally important for adults. Because vitamin D enhances calcium absorption, and both nutrients are abundant in chirimen-jako, it serves as an efficient source of calcium for all ages.
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DHA for Children
EPA for AdultsDHA (Docosahexaenoic Acid) and EPA (Eicosapentaenoic Acid) are essential fatty acids that the body cannot produce on its own. DHA supports brain development and has been shown to enhance memory and learning in children. EPA helps improve blood flow and supports cardiovascular health. It is gaining attention for its role in preventing lifestyle-related diseases, such as heart disease and high blood pressure. Additionally, EPA is known to help lower triglyceride levels, making it beneficial for those pursuing healthy weight management.
How Chirimen-jako (Dried Shirasu) Is Made
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1. Catch
Fishermen go out to sea and harvest juvenile sardines (shirasu) using fishing boats.
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2. Auction
The catch is brought to the port and proceeds to auction.
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4. Drying
The boiled shirasu are dried in the sun or using other drying methods.
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3. Boiling
Since shirasu is highly perishable, freshness is essential. Immediately after the auction, the fish are thoroughly washed and quickly boiled in large kettles for about one minute. This results in "kama-age shirasu" (lightly boiled shirasu).
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5. Foreign Matter Removal
Unwanted materials are removed using specialized machines and visual inspection by skilled workers.
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6. Completion
Delicious and safe chirimen-jako is now ready to be enjoyed!
