Akami at 95 degrees: Akami sashimi · 169

The lean red flesh, low in fat, where tuna's own savoury depth and faint acidity come through most clearly. It is the foundation of sushi and the classic candidate for a soy marinade. Clear ruby colour, with no iridescent sheen across the cut surface. Lean red meat — freshness shows as gloss, not marble.

Colour, sinew, where the fat sits, and thickness are what you check before you pay. Ask for the thickness that matches “Akami sashimi.” Use 95 degrees and 95 when you cook. Salt after you know the job. Do not play with undercooked meat. Cook Akami to 95 degrees and serve it as “Akami sashimi.” The other figure to watch is 95. Do not time a hard-working muscle like a thin steak. Colour before heat is not doneness. Ten minutes in soy is enough to multiply the savouriness without cooking the surface.

Cook Akami to 95 degrees and serve it as “Akami sashimi.” The other figure to watch is 95. Do not time a hard-working muscle like a thin steak. Colour before heat is not doneness. Ten minutes in soy is enough to multiply the savouriness without cooking the surface. A cut’s grain comes from how much the muscle worked. Akami needs heat through to 95 degrees before “Akami sashimi” makes sense. 95 is a stage of that heat, not a luxury score. The same cut becomes a stew, a grill, or a braise, so a steak minute does not cover a pot. Thick connective tissue wants time, not a hard sear alone. This is not medical advice.