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Japanese · Japan

Nikogori Gelatin Aspic Japanese Fish Dish

Nikogori (煮凝り, boiling-congealed) is Japan's natural fish aspic — the natural collagen released during simmering fatty fish (anago, buri, saury) that sets to a firm jelly when cold. Unlike Western gelatin-set aspics using added gelatin powder, nikogori relies entirely on the collagen naturally present in fish skin and bones. The result is served cold as a winter delicacy, prizing the pure fish flavor. Anago (saltwater eel) nikogori is the most refined — clear, trembling amber jelly with concentrated eel flavor. Served with grated wasabi and a drop of soy sauce. The process requires cooking the fish slowly with enough water to cover, then removing fish and allowing broth to set naturally.

ServesFour portions
Sourced2of 7 in BC
Cook
I

The Market List

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600 g
anago (saltwater eel)
whole or portioned, skin and bones intact
Not yet stocked in British Columbia
30 ml
30 ml
mirin
Not yet stocked in British Columbia
30 ml
sake
Not yet stocked in British Columbia
800 ml
water
enough to cover fish
Your own market
To serve
20 g
fresh wasabi
grated
Not yet stocked in British Columbia
15 ml
soy sauce
a few drops per portion
Purely Artisan Foods · San Diego →

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II

The Method

1
Place the anago, skin and bones intact, in a wide, heavy pan. Add the sake, mirin, and light soy sauce. Pour over enough cold water to cover the fish entirely. Set over low heat and bring slowly to a bare simmer — small bubbles breaking at the surface, never a rolling boil. The collagen in the skin and bones begins to dissolve into the liquid at this stage.
2
Maintain the lowest possible simmer throughout cooking. Aggressive boiling emulsifies the fat and proteins, producing a cloudy, opaque liquid that will not set to a clear amber jelly. The broth should remain translucent and just trembling. This is where the dish lives or dies: a boiled broth cannot be recovered.
3
When the fish is just cooked through, lift it carefully from the broth. Remove and discard the bones; reserve the flesh. Do not allow the fish to sit in the residual heat of the broth, as it will continue to cook. The flesh should be tender and just yielding to light pressure.
4
Test the set: spoon a small amount of the warm broth onto a cold plate and place in the freezer for five minutes. The broth should gel firmly when cold. If it remains liquid, return the broth to the heat and reduce by one third to concentrate the collagen, then test again.
5
Arrange the reserved fish flesh in flat containers or moulds. Strain the broth over the fish to cover. Allow to cool to room temperature, then transfer to the refrigerator. The jelly is set when it holds a clean, trembling shape and the surface is clear amber with no cloudiness.
6
To serve, turn out or slice the nikogori into neat portions directly from the flat container. Serve cold, with freshly grated wasabi alongside and a few drops of soy sauce. The jelly should be firm enough to hold its form on the plate yet dissolve cleanly on the palate.
III

Quality Hierarchy

01
Reserve — Live or same-day anago from a specialist fishmonger, cooked with sake-steaming to yield the most delicate and pellucid nikogori; natural set achieved without any reduction.
02
Estate — Fresh whole anago with skin and bones fully intact; broth sets to a clear amber jelly on first attempt with minimal reduction.
03
Market — Fresh buri (yellowtail) or karei (flounder), both collagen-rich in skin and bone; jelly sets well, flavour slightly less refined than anago.
04
House — Saury or other fatty fish with significant skin and bone collagen; adequate natural set, though broth may require reduction to achieve a firm jelly.
IV

Sensory Tests

◇Sight. The simmering broth remains translucent throughout cooking — any cloudiness signals the heat is too high and collagen clarity is lost.
◇Touch. A spoonful of warm broth gels firmly on a cold plate after five minutes in the freezer; it holds its shape when tilted.
◇Sight. The set jelly is clear amber with no milky or opaque zones; the fish is visible through the surface.
◇Touch. The sliced nikogori holds a clean edge and trembles when the plate is moved, but does not collapse or weep liquid.
◇Where it lives or dies. Nikogori lives or dies at the simmer: a broth held at the barest tremble yields a clear, collagen-rich jelly, while a boiling broth emulsifies into opacity and will never set cleanly.
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VI

What to Pour

The pairing
Aramasa No. 6 X-type Junmai Ginjo
Aramasa Shuzo · Yamagata
Not yet stocked in British Columbia
Sake
From British Columbia

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Without alcohol

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The whole pairing
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Sourced through Provenance

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