Barred knifejaw nigiri

Barred knifejaw (Ishidai)

【Nigiri sushi: Shiromi】
Barred knifejaw (Oplegnathus fasciatus), known as ishidai in Japanese, is a visually striking sushi topping, with vivid stripes on its skin and beautiful pink flesh that looks stunning as nigiri. It has a pronounced sweetness and a firm, satisfying texture. It uses its powerful jaws to feed on hard-shelled creatures such as barnacles and sea urchins, and this diet is thought to contribute to its excellent flavor.

Because it inhabits rocky reefs, fishing methods are largely limited to angling, spearfishing, and gillnetting, resulting in a limited supply of wild-caught fish. Consequently, it is considered a high-end fish and is typically sold at market prices. Even smaller specimens have rich umami and an excellent texture, making ishidai a favorite among many sushi chefs.

In fact, a fish’s name does not necessarily indicate that it belongs to the sea bream family, even if its Japanese name contains the character tai or dai, meaning sea bream. Many fish are named for their resemblance to red sea bream or their reddish body color. For example, the kinmedai (splendid alfonsino), known for its large, sparkling eyes, and the amadai (tilefish), with its large head and stocky body, are not members of the sea bream family. Among these so-called “false sea breams,” ishidai stands out as one of the most flavorful fish for sushi.

【Also known as】
Rock bream, Striped beakperch, Striped knifejaw

【What is ishidai】
Ishidai (Barred knifejaw) is widely distributed from the entire coast of Hokkaido to the southern coast of Kyushu, except for the southern part of the Chitose Islands. They are scarce in the Sea of Japan and abundant in the temperate zone from the Boso Peninsula to the southern coast of Kyushu.

【Related contents】
What is Spotted knifejaw (Ishigakidai) sushi?

(Revision date: October 26, 2026)