Tsurizukan

Fish

Japanese Horse Mackerel マアジ

Trachurus japonicus ・ Carangidae (Jacks)

Japanese Horse Mackerel (Trachurus japonicus)
Photo: Totti / CC BY-SA 4.0 — source

Catch season

Schools of small fish come to the piers from early summer to autumn and are easy to catch on sabiki rigs. Better fish come at night on float rigs, and small ones are prized as live bait.

About

The row of spiny scutes called zeigo runs the entire length of the lateral line, the surest way to tell it from round scad, which has them only on the rear half. The lateral line itself dips sharply downward near mid-body, and there is a dark blotch on the upper edge of the gill cover. Inshore residents are yellowish and deep-bodied, while migratory offshore fish are darker and slimmer. Best in summer, it turns up as everything from sashimi to dried fillets.

Basics

Scientific name
Trachurus japonicus
Family
Carangidae (Jacks)
Japanese name
マアジ
Kana
まあじ
Also called
アジ, 豆アジ, まめあじ
Waters
Sea of Japan, Northern Pacific coast, Southern Pacific coast, Seto Inland Sea, East China Sea & western Kyushu
Size
25 cm (max 50 cm)
Time of day
Dawn, Dusk, Night
Depth (tana)
Surface to mid-water. With a sabiki rig, work the wall at your feet; if the school is up, fish just under the surface.

How to catch it

Sabiki rigs, a string of small hooks worked through ground bait, are the classic beginner's fishery off breakwaters, and summer night sessions are a seasonal fixture. Boat anglers chum with minced sardine and fish a boom-and-sinker rig all year.

Sabiki (bait-jig) fishing from a Breakwater / Pier

Shake the cage to release the krill, then hold the rig still inside that cloud. Everything depends on keeping the school at your feet, so the more often you refill the cage, the more you catch.

Areas: Tokyo Bay, Osaka Bay

Waters: Sea of Japan, Northern Pacific coast, Southern Pacific coast, Seto Inland Sea, East China Sea & western Kyushu

Float fishing from a Breakwater / Pier

The better fish, a size up from what the sabiki rigs produce, come out around the harbour lights after dark. Start at about three fathoms and, if nothing happens, shorten by 50 cm at a time.

Waters: Sea of Japan, Northern Pacific coast, Southern Pacific coast, Seto Inland Sea, East China Sea & western Kyushu

Kit for this fish

Sabiki starter kit ・ Kit total ¥14,000–32,000

Always include the life jacket, and add the child version if you are bringing children. This kit alone is enough to start.

Product links may be affiliate links. Prices move, so treat the ranges as a guide.

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Eating

Eating quality 5/5 ★★★★★

Good as sashimi, namerou, dried or fried. Sashimi on the day you catch it is a different fish from anything you can buy.

Best eating: May–August

Rules

Some prefectures set a minimum size in their fishery regulations. Check the rules where you are going.

Closed seasons and size limits — how to find the numbers, which differ by prefecture

This article organises general information and is not legal advice. Rules differ by municipality and by fishery cooperative, and they change. Always check the current rules for where you are going.

Other fish taken the same way

Other fish from the same kind of place