Yeosu city, South Jeolla province; the fishing port's access to Yellow Sea blue crab and the local anchovy fishing tradition combine to create a distinctive regional gejang style
Yeosu's ganjang gejang tradition (여수 간장게장) represents the most refined expression of raw soy-marinated crab in Korea — using locally harvested Yellow Sea blue swimming crab (꽃게, kkotge, Portunus trituberculatus), cleaned live, and submerged in a repeatedly boiled and cooled soy marinade enhanced with local dried anchovy, kelp, and seasonal aromatics over 5–7 days. The Yeosu style differs from Seoul and Jeolla city versions in its marinade's additional depth from local anchovies and the extended multi-boil cycle that concentrates the soy without making it aggressively salty. The local cold-water crab from the Yeosu Strait has firmer flesh and more richly flavoured roe than inland-sourced crab.
Yeosu ganjang gejang's roe, spooned directly onto rice and mixed, creates one of Korean cuisine's most intensely satisfying rice experiences — the savoury, slightly oceanic paste combined with plain rice makes the simplest possible meal irresistible.
{"Three-boil cycle over 5 days: boil marinade on day 1, pour over crab, cool; remove crab, re-boil marinade on day 3, cool, return crab; repeat once more on day 5 — each cycle concentrates flavour and re-penetrates the crab","Marinade composition for Yeosu style: ganjang base + dried anchovy + kelp + dried chilli + garlic + ginger + sake or cheongju — the anchovy adds a specific maritime depth that non-coastal styles omit","Use live female crabs (암게, amge) with bright orange roe visible through the shell — the roe's flavour transformation during marination is the dish's signature element","Clean crabs with cold water and a brush only — no hot water, which would begin cooking the flesh before marination"}
The temperature of the marinade when poured over the crab is debated among practitioners: some pour at boiling (which begins surface cooking), others cool to 40°C before pouring (which prevents any cooking). The Yeosu tradition cools to approximately 70°C — hot enough to drive initial penetration without cooking, then the cool that follows as the marinade reaches the crab's temperature drives osmotic exchange.
{"Single-day marination — short exposure produces surface-seasoned crab rather than the fully integrated marinade penetration that defines quality gejang; minimum 3 days for basic quality, 5–7 days for the full Yeosu expression","Not re-boiling the marinade — used marinade releases crab liquid on each cycle, diluting the concentration; re-boiling restores the seasoning intensity"}