ITADAKI ATLAS

Seafood ── Shellfish and cephalopods

Torigai

a black-footed clam named for its bird-beak-shaped foot

A bivalve said to be named for a foot shaped like a bird's beak. In Edo-style sushi it is boiled black and butterflied for nigiri, prized for a crisp bite and mild sweetness, in season winter through spring.

  • Shellfish

What it's made of

This bivalve is said to be named for a foot shaped like a bird's beak. In Edo-style sushi the foot is boiled black and butterflied for nigiri, prized for a crisp bite and a mild sweetness underneath. The bigger and blacker the foot, the firmer and better the meat is said to be — an unusual clam whose sweetness is said to come through more once cooked than raw. The snap on first bite and the briny note that lingers after feel almost like two different sensations.

How it's made

It burrows just under the surface of shallow, muddy sand, so it is caught in bulk by dredge net. Once landed, the meat is freed from the shell and the foot briefly scalded, then plunged into ice water — that jump from heat to cold is said to be what sharpens its crisp bite, and the blackened surface is usually left as is for nigiri. The innards are trimmed away and handled separately from the foot, sometimes simmered in sake on their own.

Why it took this shape

Shallow tidal flats like those of the Seto Inland Sea are said to offer the soft, muddy sand and steady nutrients this clam favors. Its flesh is said to firm up as water temperatures drop from winter into spring, and its season is understood to track that same shift. Its catch is also known to swing with how much tidal flat area remains from year to year, making it something of a barometer for the health of that shoreline.

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