Hirame Flounder Flatfish Engawa Japanese Sashimi

Japanese coastal waters; Oita and Ehime aquaculture centers; winter wild catch most prized

Hirame (Japanese flounder or bastard halibut, Paralichthys olivaceus) is considered one of the premier white-fleshed fish in Japanese sashimi tradition, prized for its clean, delicate flavor, firm but yielding texture, and elegant translucence when sliced properly. The finest hirame is aquaculture-raised in certain regions (particularly Oita and Ehime) and wild-caught in winter months when it develops protective fat stores that add richness to the flesh. The most prized cut is engawa—the thin fringe of fin-driving muscles along the outer edge of the flatfish that has worked intensely throughout the fish's life. Engawa has fine marbling, a distinctive chewy-silky texture quite different from the main body flesh, and a sweeter more complex flavor. Because flatfish are prone to anisakis parasites, hirame is often aged briefly and examined carefully. The five-piece kakuni-style filleting method for flatfish (go-mai oroshi) is a core knife skill in Japanese cookery—the two upper, two lower, and central bone pieces are separated with an understanding of the fish's bilateral anatomy. Usuzukuri paper-thin slicing displays hirame's translucence beautifully.

Clean, delicate sweet white fish; engawa has richer marbled sweetness; translucent flesh; subtle oceanic finish