Simmered Flounder (カレイの煮付け, Karei no Nitsuke)

Flatfish asks for a quiet hand. Karei has delicate flesh and a skin that turns glossy when it meets soy, sake, and mirin, which is why this dish looks more elaborate than it is. The fear is that the fish will break. It won't, if you stop treating it like meat in a pan.

The first secret is the shallow simmer. Bring the broth to life before the fish goes in, lay the pieces skin-side up, and don't turn them. The bubbling broth laps over the surface, and the otoshibuta, a drop-lid that sits directly on the food, keeps the seasoning moving evenly without your spoon doing damage. A circle of parchment will do the same honest work.

This is nimono, the simmered method, at its clearest: dashi, soy, sake, mirin, a little sugar, and ginger to steady the fish's sweetness. Nothing hidden. If the karei is glistening fresh, the broth only needs to frame it. Cook it briefly, baste once or twice, then leave it room on the plate with a spoonful of that lacquer-dark broth. The dish should taste calm, not conquered.