Izu Islands Kusaya: Fish Fermented in Kusaya Brine
Kusaya is fish such as mackerel scad or flying fish soaked in a repeatedly maintained fermented salt brine, then dried in Tokyo's Izu Islands. Grilling releases an exceptionally strong...
At a glance
| Name | Izu Islands Kusaya: Fish Fermented in Kusaya Brine (Kusaya) |
|---|---|
| Prefecture | Tokyo |
| Region | Kanto |
| Type | Fish cured in a maintained fermented brine and dried |
What is it?
Kusaya is fish such as mackerel scad or flying fish soaked in a repeatedly maintained fermented salt brine, then dried in Tokyo's Izu Islands. Grilling releases an exceptionally strong aroma, while the flesh delivers concentrated savory flavor.
It is not spoiled fish. It is a controlled fermented and dried product, best understood as an island preservation food from Niijima, Hachijojima, Oshima, and neighboring islands rather than metropolitan Tokyo cooking.
History and local context
A common historical explanation says scarce salt encouraged islanders to reuse fish-curing brine. Over repeated use, the liquid developed a stable microbial community that each producer continues to manage.
Both Niijima and Oshima appear in origin traditions, so one birthplace should not be asserted as certain. Niijima is now especially recognized as a leading production center.
How to enjoy it
Grill the raw dried fish with strong ventilation until properly heated, then remove skin and bones and pull the flesh into small portions. Shochu, sake, rice, lemon, and island chili can balance the intensity.
Beginners can choose pre-grilled flaked kusaya or a small vacuum pack. Check storage instructions and transport rules, since the aroma can spread once the package is opened.
Availability varies by maker, season, and destination.
Sources and further reading
Frequently asked questions
Where is Izu Islands Kusaya: Fish Fermented in Kusaya Brine from?
It is associated with Tokyo, in the Kanto region of Japan.
What kind of food is Izu Islands Kusaya: Fish Fermented in Kusaya Brine?
This guide classifies it as fish cured in a maintained fermented brine and dried. See the overview for its defining ingredients and texture.
Can I order Izu Islands Kusaya: Fish Fermented in Kusaya Brine online?
Use the Rakuten Japan search link on this page. Confirm the maker, ingredients, storage requirements, and international shipping before ordering.
Order from Japan
Search Rakuten Japan using the original Japanese food name. Search results and product pages may be available only in Japanese.
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