Sardine Day (Iwashi no Hi)

What Is Sardine Day?

October 4th is "Sardine Day." Based on the wordplay "10 (iwa) + 4 (shi)" — which together sound like "iwashi" (sardine) — this anniversary was established in 1985 by the National Sardine Association. Its purpose is to increase sardine consumption and raise awareness of its high nutritional value.

Why Is October 4th "Sardine Day"?

The date comes from the wordplay "10 (iwa) + 4 (shi)." Autumn is also when sardines become especially fatty and delicious, making it a fitting time to highlight the appeal of this seasonal fish.

• Wordplay: 10 (iwa) + 4 (shi) = "Iwashi" (sardine).
• Established in 1985: Created by the National Sardine Association.
• Peak season: Sardines are especially delicious in autumn.

What Is a Sardine?

Sardines are an oily fish that has long been a staple of the Japanese table, known for their exceptionally high nutritional value.

• Varieties: Japanese sardine (maiwashi), round herring (urume-iwashi), Japanese anchovy (katakuchi-iwashi), and more.
• Characteristics: Small in size, forms large schools, and is caught in large quantities.
• Season: Varies by species, but autumn brings particularly fatty, flavorful sardines.

Nutrition and Health Benefits of Sardines

Sardines are a leading example of a "healthy fish."

• DHA and EPA: Support brain function and help improve blood circulation.
• Calcium: Supports bone health.
• Vitamin D: Helps the body absorb calcium.
• Protein: A great source of high-quality protein.

Interesting Facts About Sardine Day

• A friend to everyday households: Long valued as an affordable and nutrient-rich fish.
• Wide range of processed products: Used in many forms, including shirasu (baby sardines), niboshi (dried sardines), and anchovies.
• Part of Japanese food culture: Prepared in many ways, including simmered in miso, simmered with pickled plum, sashimi, and fish dumplings (tsumire).
• Environmentally friendly too: With relatively stable populations, sardines are gaining attention as a sustainable fish choice.

Tips for Enjoying Sardine Day

• Enjoy seasonal sardine dishes such as sashimi, fried sardines, or simmered sardines.
• Try processed products like shirasu or niboshi for an easy way to enjoy sardines.
• Incorporate the health benefits of EPA and DHA from oily fish into your diet.
• Look for fresh sardines at your local fish market or seafood shop.

A Small Fish Packed With Big Nutrition and Culture

"Sardine Day" on October 4th is a chance to rediscover the appeal of an oily fish that has long supported Japanese food culture. Enjoy its seasonal flavor and health benefits.