Kisu no Tempura (キスの天ぷら, sand whiting tempura)

Kisu looks more delicate than it behaves. That is kind of it. A small summer fish, butterflied open and fried for less than a minute, becomes the quietest piece on a tempura plate: sweet, clean, and pale, with no need for a loud sauce to announce itself.

The first secret is not the batter. It is the fish. Kisu, Japanese sand whiting, should be glistening fresh, firm, and faintly sweet-smelling, never strong. This is 旬 (shun), the fish at its prime in warm months, and the season does more work than the cook. If the fish is tired, don't make tempura of it. Nothing hidden means nothing rescued under batter.

Then comes the cut. We open the fish from the belly, remove the backbone, and leave the two fillets joined like a small fan. This shape is not decoration for its own sake. It gives the oil a thin, even piece to cook, so the flesh sets quickly while the batter stays light. Let the knife do some of the seasoning before the oil ever sees it.

Tempura frightens people because oil has a reputation for mischief. Here the rule is plain: cold batter, hot oil, and no fussing. Mix the batter only until streaky, because a smooth batter has been worked too much and turns bready. Fry the kisu once, briefly, and serve it at once with tentsuyu, grated daikon, and lemon or sudachi. 本物 (honmono) is often only this: the right fish, cut cleanly, given room.