Seafood ── Fish
Katsuo
bonito — the fast-swimming icon of early-summer Japan
A migratory fish riding the Kuroshio current north each spring, lean in early summer and richer once it turns south in autumn. Seared with straw as tataki or served raw, with flavor prized most near the ports the current runs closest to.
- Red-fleshed fish
What it's made of
A migratory fish riding the Kuroshio current from Tosa to Sanriku, lean and clean-tasting when caught in early summer as 'hatsu-gatsuo', then richer by autumn as it turns south and packs fat under the skin for the 'modori-gatsuo' run. Even within one fish, the firm red flesh and the darker chiai muscle taste distinct, and both fat content and firmness shift with the season and the water temperature of wherever it was caught — the same fish tasting almost unrecognizable from one month to the next.
How it's made
Tataki sears the skin over a blazing straw fire while leaving the center raw, melting the fat just under the skin without cooking it through. Fish taken by pole-and-line are bled immediately, and after searing, the fillet is plunged into ice water fast so residual heat doesn't overcook it. Sliced thick right after searing and served with salt or ponzu and sharp aromatics, even a lean early-summer catch reads as full of flavor.
Why it took this shape
The Kuroshio runs close offshore of Tosa Bay, where pole-and-line fishing has long thrived and where straw-seared tataki is said to have originated. Ports near the current, like Yaizu and Kesennuma, land it within hours of catching, and that short trip from sea to store is what fresh flavor comes down to. As the current moves north through the year, the fish's peak season is said to travel with it, port by port.
Before you go
- How to shop at a supermarketHow to choose prepared foods, sashimi, and packaged sushi, when discount stickers tend to appear, region-only specialties, buying by weight, the checkout and bagging flow, and sampling etiquette at a local supermarket.
- Roadside stations, direct-sale stands, and marketsHow to enjoy buying food near where it's produced, visiting and shopping at morning markets and fish markets, what to expect at farm stands, and finding local food at roadside stations (michi-no-eki).
- Foods to look for in springA guide to foods often seen in Japan around spring — early bonito, bamboo shoots, sakura mochi, hanami bento, new-season tea, and butterbur sprouts — with rough pointers for finding them.
Dishes in the same style
- SakeA migratory fish that returns to spawn in its home river, fattening the longer it feeds in northern seas. Salted, dried as aramaki, or taken for ikura roe — river-mouth ports landing it just before the spawning run prize both its fat and firm flesh.
- AinameA white-fleshed fish of rocky shores, served raw or simmered in old Edomae style. Sedentary by nature, it varies by region, and in some Tohoku ports its liver is eaten too — a fish long prized as a local catch.
Ingredients and dishes from this land
Known for it here / Known source
- Known for it here: Kochi
The Kuroshio current runs just offshore of Tosa Bay, where pole-and-line fishing has long thrived and where straw-seared tataki is said to have originated.
- Known source: Miyagi, Kesennuma
- Known source: Shizuoka, Yaizu
Contrast
- MaguroToday's king of sushi, served soy-cured in old Edo. Oma, Nachikatsuura, Misaki and Yaizu are its famed landing ports.
- SanmaA slender migratory fish at its peak in autumn, traditionally grilled whole with salt, innards included. Ports facing waters where the shoals come close to shore land the most, and the fat and bitter innards are said to reflect that year's catch.
- MekajikiA large fish with a sword-like snout, cut into thick steak-like fillets and glazed teriyaki-style or fried. Ports facing the Sanriku fishing grounds, worked by coastal longline, land the most and rank among Japan's top sources.
Uses
- Tekone-zushiSoy-marinated bonito sashimi mixed straight into vinegared rice — a fisherman's dish from Shima and Kumano Bay, Mie. Said to be named for sailors who cleaned their catch and mixed it in by hand on deck; no mold, no pressing.
- TakoyakiA round snack from Osaka: batter of flour, egg, and dashi poured into a griddle of hemispherical molds and folded around a chunk of octopus. It's said to have taken its present form when a stall snack called radio-yaki swapped in octopus as the main filling.
- GawaRaw bonito is minced and mixed into a chilled miso broth with cucumber, pickled plum, and shiso. Its name is said to come from the "gawa-gawa" sound of stirring miso into ice water aboard a fishing boat — originally a summer meal made at sea.
- Namaribushi to Shiro Tamanegi no SaladNamaribushi — half-cured bonito, a step before katsuobushi — is blanched and flaked, then tossed with a sweet white onion bred from a variety brought from Aichi. Made from bonito landed at Yaizu port, boiled and smoked into the cured form.
- KoshimeshiRice cooked with dried baby sardines or minced fish is finished with rock nori called menori, gathered by wading chest-deep into the winter sea — a New Year's Eve dish from Otsuki Town. The name is said to derive from "koshimeshi," rice for seeing out the year, and it long stood in for the more common year-end soba noodles.