What makes Hokkaido Uni different
Uni quality is determined almost entirely by water temperature, diet, and handling. Hokkaido — Japan's northernmost main island — sits at the intersection of the cold Oyashio current from the north and the warmer Tsugaru current. The resulting cold, nutrient-rich waters produce sea urchin with exceptional sweetness, clean oceanic flavor, and the characteristic creaminess that defines world-class uni.
Most uni served in the US — including at Japanese restaurants — is treated with alum (ミョウバン) to firm the texture and extend shelf life. Alum introduces the bitterness that many people associate with uni and assume is natural to the ingredient. It is not. Sashimi DC's Hokkaido Uni is not treated with alum, or treated with only minimal alum — close enough to none that there is no bitterness.
The bitterness you may remember from uni is not what uni tastes like. It is what alum tastes like. Hokkaido Uni from Sashimi DC is not treated with alum, or treated with minimal alum.
How to eat uni
Uni is best eaten simply. On a small amount of warm sushi rice — the rice should be at body temperature, not cold, so that the fat in the uni softens slightly on contact. A small touch of wasabi placed directly on the uni before eating. No soy sauce needed for good uni; if you must use it, dip lightly.
Uni also works as a finishing element on pasta, on scrambled eggs, as a sauce component, or eaten directly from the tray with a small spoon. The one thing that diminishes it in every application is heat — uni should never be cooked. It goes on hot food at the last second, after the heat source is removed.
Seasonal availability
Uni availability shifts by season and by fishing conditions in Hokkaido. Bafun season typically peaks in summer, Murasaki in spring and late autumn. We carry whichever variety is at its seasonal best — sometimes both simultaneously, sometimes one or the other. Availability is posted weekly in the shop and on our updates page.
Uni sells out quickly. If you want it, order early in the day or check with us before making the trip.
Cold chain — and vibration
Uni is unusually sensitive — not just to temperature, but to physical disturbance. Vibration during transport can damage the delicate lobes, causing them to break apart and lose their structure before they reach you. A piece of uni that has been shaken excessively on the way to your table looks different, feels different, and tastes different from one that arrived intact.
We manage both. The cold chain from Hokkaido to Washington DC is handled the same way as the Bluefin Tuna route — direct air, documented temperature, no unnecessary intermediaries. The packaging is designed to minimize movement during the final leg of delivery. This is one reason we do not ship uni long distances through standard courier services — the vibration profile of ground shipping is not compatible with uni quality. (American roads do not help.)
