Sanriku coast, Hokkaido (Nemuro, Kushiro ports) — autumn migration from cold northern Pacific waters
Sanma (秋刀魚, Pacific saury, Cololabis saira) is Japan's most powerfully seasonal fish — the embodiment of autumn in Japanese food culture. The name itself combines three characters: autumn, sword, and fish — describing both its season and its sleek silver form. Sanma appear in Japanese waters from Hokkaido south through Sanriku coast from late August through November, migrating from cold Pacific waters where they feed on krill and develop the distinctive high-fat content that makes autumn sanma exceptional. The fat content of autumn sanma can reach 20%+ — creating the rich, oily, slightly bitter character that pairs so perfectly with grated daikon and citrus. Preparation is almost exclusively shioyaki (salt-grilled whole): the fish is scored lightly, salted, then grilled over shichirin (small charcoal grill) or binchotan until deeply charred on the outside and barely cooked through. The bitterness of the innards (harawata) is considered a flavour dimension, not a flaw — many connoisseurs eat the whole fish including the bitter entrails. Serving protocol: grated daikon (with or without dried chili — momiji-oroshi), sudachi or kabosu half, and soy. The shichirin (小型七輪) is the traditional sanma cooking vessel — a small cylindrical ceramic charcoal grill that concentrates heat perfectly for shioyaki. Hokkaido's Nemuro and Kushiro ports are the primary sanma landing centres.
Rich, oily, slightly bitter (from innards and charred skin); high-fat saury character; daikon cuts the oil; sudachi brightens and lifts; soy anchors the salt baseline
{"Sanma = autumn sword fish — the most powerfully seasonal fish in Japanese cuisine","Fat content 20%+ in peak October sanma — creates rich, oily character","Shichirin (small charcoal grill) is the traditional vessel for sanma shioyaki","Bitter harawata (entrails) is a flavour dimension — authentic sanma lovers eat the whole fish","Serving protocol: grated daikon + sudachi/kabosu + soy — non-negotiable accompaniment","Hokkaido (Nemuro, Kushiro) is the primary sanma landing port for the most prized specimens"}
{"Buy sanma with visible fat (iridescent sheen under the belly) — the visible fat content indicates peak autumn condition","Score the skin diagonally three cuts on each side before salting — allows fat to render and prevents skin bursting","The bitter-oily harawata scraped from the grilled sanma onto warm rice with soy is a Japanese izakaya experience worth introducing to adventurous guests"}
{"Removing the innards before cooking — loses the authentic bitter character that defines proper sanma shioyaki","Grilling sanma without adequate charcoal heat — gas cannot achieve the same surface caramelisation","Serving without sudachi or kabosu — the citrus acid is essential to cut the high fat"}
Tsuji, Shizuo. Japanese Cooking: A Simple Art. Kodansha, 2012.