Sardine Day (Iwashi no Hi)

What Is Sardine Day?

October 4th is "Sardine Day." Based on the wordplay "1 (i) + 0 (wa) + 4 (shi)" — which together sound like "iwashi" (sardine) — this anniversary was established in 1985 by a study group on the effective use of abundant fish species (now the Osaka Fish Health Food Council). 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 "1 (i) + 0 (wa) + 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: 1 (i) + 0 (wa) + 4 (shi) = "Iwashi" (sardine).
• Established in 1985: Created by a study group on the effective use of abundant fish species (now the Osaka Fish Health Food Council).
• 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 in Sardines

Sardines are a leading example of a nutritious oily fish.

• DHA and EPA: Omega-3 fatty acids found in abundance in oily fish.
• 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).
• Boom and bust: Japanese sardine catches swing widely over decades. In 1988 about 4.5 million tons were landed, some 40% of Japan's total catch, but catches later fell sharply for a time.

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.
• Add one oily-fish dish to your usual menu.
• 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.