Seikogani is the female snow crab known as Matsuba-gani in the San’in region of Japan. Smaller and less abundant than the male crab, it is prized for its intensely savory flavor, creamy crab miso, and distinctive eggs. Although once enjoyed mainly by people living near local fishing ports, seikogani has become a much-loved seasonal delicacy among seafood enthusiasts.
The fishing season for male Matsuba-gani runs from November 6 through late March, with catches landed at fishing ports throughout the San’in region, including Tottori, Shimane, Hyogo, and Kyoto prefectures. Notable ports include Sakaiminato, Hamasaka, Kasumi, Tsuiyama in the Kinosaki area, Shibayama, Asamogawa, Taiza, Miyazu, and Maizuru.
Female crabs have a more restricted fishing season and are caught in smaller quantities. Their small size and delicate nature also make them more perishable, which historically meant they were mostly eaten by local residents near the ports where they were landed.
One of seikogani’s greatest attractions is the combination of its rich crab miso and two distinctive types of eggs. Uchiko, the internal eggs or roe, has a vivid orange color, a firm texture, and a mellow, deeply savory taste. Sotoko, the external eggs attached beneath the abdomen, offers a delightful popping sensation that makes it especially appealing to adventurous seafood lovers.
These contrasting textures and concentrated flavors give seikogani a character all its own. The crab is often used to prepare kanijiru, a traditional crab soup that brings out its natural richness. It can also be enjoyed as sashimi when suitable for raw consumption, in hot pots, or steamed with sake.
The seikogani season generally runs from November through March. November and December are particularly prized, as both the internal and external eggs develop and become especially satisfying to eat.
Depending on the region, this female crab is known by several names, including koppe-gani, seiko-gani, and kōbako-gani. These local names reflect the rich crab culture found along the Sea of Japan coast.
For visitors to western Tottori, seikogani is an excellent way to experience the region’s seasonal seafood traditions. Its compact size conceals an extraordinary depth of flavor, while the combination of creamy crab miso and textured eggs makes every bite distinctive. Try it in a bowl of warming crab soup or as part of a traditional winter seafood meal to discover why this local specialty is so highly regarded.