Salt-Grilled Ayu (鮎の塩焼き, Ayu no Shioyaki)

Ayu is a fish with a season written plainly into its body. In early summer it smells faintly of cucumber and clean river stones, because it feeds on river algae when the water warms. That scent is the dish. Miss the season and no clever hand will put it back.

People hesitate over this one because the fish is served whole, skewered in a swimming curve, fins salted white like little flags. It looks ceremonial. It isn't difficult, only unfamiliar. The first secret is distance from the fire: strong heat, but not so close that the skin burns before the flesh cooks. We grill it whole because the bones, belly, and skin carry the bitter-sweet river flavor that makes ayu itself.

Salt does two jobs here. A light coat seasons the skin and helps it dry into a crisp surface, while extra salt on the fins and tail protects them from scorching. That decorative salt, kazarijio, is not vanity, though cooking has its harmless little costumes. It keeps the fish beautiful and edible.

Serve ayu as the center of a summer meal, with rice, a clear soup, and one vinegared or simmered dish beside it. Eat from the head toward the tail if the fish is small and fresh, or lift the flesh from the bone if you prefer. Nothing is hidden. Shun decides this one, and the grill only keeps faith with it.