Mackerel nigiri

Mackerel (Saba)

【Nigiri sushi: Hikarimono】
Mackerel has long been prized for its rich fat content and deep umami, yet it is also a fish that spoils quickly. For this reason, sushi restaurants traditionally prepare it as shime saba—mackerel cured with salt and vinegar. Today, it remains one of the most iconic blue-backed fish in Edomae sushi. Salt and vinegar help suppress bacterial growth and slow spoilage, while also reducing trimethylamine, the compound responsible for fishy odors, and inhibiting histamine production. Through this process, shime saba becomes both delicious and safe to enjoy.

Although the curing process does not greatly alter the moisture or fat content of the fish, the vinegar softens the richness of the fat and gives the flavor a cleaner, more refined character. The taste and texture vary depending on the degree of curing. Lightly cured mackerel retains a melt-in-your-mouth texture and highlights the luscious sweetness and umami of the fat. More firmly cured mackerel develops a tender yet slightly tighter texture, creating a beautiful balance with the vinegared rice.

In some sushi restaurants, shime saba nigiri is topped with thin strips of white kombu simmered in a sweet-and-sour sauce. The gentle sweetness of the kombu mellows the sharpness of the vinegar and harmonizes with the saltiness of the fish, further enhancing the sweetness of the mackerel’s fat.

In recent years, improvements in distribution and preservation techniques have made raw (Here, "raw" means never frozen) mackerel nigiri is increasingly common. Fresh mackerel offers a uniquely creamy texture and powerful umami, but because of the risk of parasites such as anisakis, meticulous freshness control and careful preparation remain essential.

Mackerel harvested during the cold months, when it has accumulated abundant fat, is especially prized for sushi. The moment it touches the tongue, the sweetness of the fat and the rich umami characteristic of blue-backed fish spread across the palate, leaving a long, satisfying finish. Both shime saba and nama saba possess their own distinct appeal, and each continues to captivate sushi lovers as one of winter’s defining sushi delicacies.

【Also known as】
Chub mackerel, Slimy mackerel, Thimbel-eyed mackerel

【What is Saba】
Members of the mackerel family are found in subtropical and temperate waters, and three species are known worldwide. In Japanese waters, Japanese mackerel and chub mackerel are found. As its name suggests, Atlantic mackerel is native to the North Atlantic and has become a familiar staple on Japanese dining tables. Imported mainly from countries such as Norway, it has a fat content of about 27 percent, rivaling that of tuna belly. The markings on Japanese mackerel are slightly greenish, whereas those on Norwegian mackerel are black and more distinct.

Japanese mackerel (Masaba) is found in waters around the Japanese archipelago, as well as in subtropical and temperate waters worldwide. It is a migratory fish that forms schools near the surface. From spring through summer, it migrates north along the Japanese coast to spawn, then moves south again from autumn through winter. There are two types: those that migrate over long distances around the Japanese archipelago and those that remain within a relatively limited area. The latter are considered more flavorful. The spawning season is from spring to early summer. Japanese mackerel grow to about 25 cm in their first year and over 35 cm by the age of three. They have a lifespan of six to seven years and can reach a total length of about 50 cm.

There are so many branded varieties of mackerel that it is impossible to remember them all. These include Sekisaba from the Bungo Channel, Shunsaba from the Goto Islands, Misakisaba from the Hoyo Strait, Kinkasaba from the waters off Kinkazan in Miyagi Prefecture, and Ougonsaba from Matsuwa. Sekisaba resembles Aji in appearance and has a clean, refreshing taste, while Kinkasaba is large and rich in fat. Ougonsaba has a well-balanced distribution of fat throughout its body and soft flesh that pairs well with Shari.

These branded varieties of mackerel are caught using the traditional Ipponzuri (pole-and-line fishing) method. Fishermen take great care not to handle the mackerel unnecessarily, as physical contact can cause the fish to deteriorate more quickly. They handle their catch with the utmost care to preserve its freshness.

【Temperature of vinegared rice (shari) and sushi toppings】
36℃/20～23℃

【Trivia】
Mackerel contains an ingredient called histidine. As the mackerel decays, its histidine is converted to histamine. Histamine is a toxin and it can cause urticaria, difficulty breathing from anaphylactic shock and other problems, so caution should be taken. This is why the osmotic pressure of salt is used, and the component can be removed in around two hours. This is called “shiojime”.

【The difference between masaba (真鯖) and saba (鯖)】
The “Ma” in the name of a fish or shellfish indicates that it is the most representative, superior, or valuable among the many related species. The Chinese character “真” means “genuine. Therefore, at sushi restaurants,‘masaba’and‘tai’refer to the same species.

【Related contents】
Where does the name “battera” come from?

Why are two pieces of nigiri sushi made at once?

What is Sekisaba?

What is Blue mackerel (Gomasaba) sushi?

What is Warisu?

What is Sujime?

What is Ikekoshi?

Atlantic mackerel (Taiseiyosaba)

List of Silver-skinned fish (Hikarimono)

(Previous revision date: May 16, 2025; Current revision date: November 12, 2026)