Kakuni Braised Pork Belly Soy-Mirin Method

Japan (Nagasaki Chinese-influenced origin; nationwide adoption; Okinawa rafute is a related variant with awamori)

Kakuni (角煮, 'square simmered') is the Japanese approach to braised pork belly — thick blocks of pork belly (3–4cm cubes) simmered for 2–3 hours in sake, soy sauce, mirin, and sugar until the collagen converts to gelatin, the fat becomes translucent and tender, and the whole block trembles with a yielding richness that has become one of the defining textures of Japanese comfort food. The name refers to the characteristic square cut. The method requires initial par-boiling to remove impurities (for 10 minutes with leek and ginger), a rest period, then a long simmer in the braising liquid. Ideally, kakuni is made a day ahead and chilled — the congealed fat layer is removed, and the pork reheated in the reduced sauce which, by then, has achieved a concentrated sweet-soy glaze quality. Simmering in a liquid that starts with sake and mirin burned off before soy is added prevents the harsh alcohol edge that raw sake addition can impart. Nagasaki's Buta no Kakuni (with Chinese-influenced ryukyu-style) uses rice wine, a technique imported from Chinese braised pork traditions, while Tokyo-style uses standard sake and domestic soy. Served with hard-boiled eggs simmered in the same liquid (umani tamago) and blanched spinach with sesame.

Sweet, soy-caramelised, richly gelatinous pork with trembling fat; deep mirin sweetness; concentrated glaze coats each cube; pairs with white rice and mustard