Sekiaji: Japan’s Premium Seki Horse Mackerel

Sekiaji (Seki horse mackerel, 関あじ) is a branded Japanese jack mackerel from Saganoseki, in Oita Prefecture on the island of Kyushu. It is not a separate species. Only fish caught individually by hook and line, known as ippon-zuri (一本釣り), by members of the local cooperative branch can carry the name. The fish became famous after its name spread in the 1980s. Today it is sold as a premium fish, priced well above everyday aji. So what helps explain its premium status? This guide explains the strait, the fishing, the careful handling, the brand tag, and how to enjoy Sekiaji as sashimi in Oita. Quick Facts: SekiajiJapanese name関あじ (Seki aji), pronounced seh-kee ah-jeeFishJapanese jack mackerel, Trachurus japonicus (マアジ, ma-aji)WhereHayasui Strait off Saganoseki, Oita City, Oita PrefectureWho can use the nameFishers of the Saganoseki branch of the Oita Prefectural Fisheries CooperativeHow it is caughtHook-and-line fishing (ippon-zuri) with lures or ragwormsHandlingKept alive, priced by eye (tsuragai), rested a day, then bled (ikejime)Peak seasonJuly to September, according to Oita City and Oita PrefectureBest way to eatSashimiBrand protectionRegional collective trademark (2006) and a tag...