数の子 · カズノコ · kazunoko

Kazunoko

Kazunoko is herring roe — a firm golden block of tiny eggs with a signature crackling crunch, salt-cured then steeped in dashi. An auspicious New Year's delicacy.

Also known as

herring roe, komochi kombu

Species

Clupea pallasii (Pacific herring (roe))

Category

Roe & uni (gunkanmaki)

Texture

crackling, crunchy — briny, snappy, dashi-savory

Peak season

Dec, Jan

Sustainability

varies — From Pacific herring; stock status and the sac-roe fishery vary by region (Alaska, British Columbia, Japan).

Mercury

Not in the FDA consumer table

Pregnancy

Eat in moderation

Price tier

$$$

Roe with a crunch

Kazunoko is herring roe — the whole egg skein of Pacific herring, served as a firm golden block rather than loose pearls. Its hallmark is texture: a dense, crackling crunch (the Japanese say kotsun-kotsun) unlike any other roe. It’s prepared two classic ways — salt-cured (shio-kazunoko), or desalted and steeped in a light dashi-shoyu brine that seasons it through.

Why it’s a New Year’s food

Kazunoko is a fixture of osechi, the New Year’s spread. A single herring lays a vast number of eggs, so the roe stands for fertility and a flourishing family — the name itself puns on kazu, “number.” A prized variant, komochi kombu, is herring roe laid in sheets on kelp.

Where it comes from

The roe comes from spawning Pacific herring — a small, low-mercury forage fish — and the sac-roe fishery (notably Alaska, British Columbia and Japan) is run on quotas, with sustainability varying by stock. A world apart in texture from the bursting pearls of ikura.

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