Horse Mackerel

あじ

One of Japan's most common everyday fish. Chub mackerel (maaji) dominates; main production is in west Japan (Nagasaki, Shimane, Miyazaki). Widely processed as dried opens and nanban-zuke

Taste & Texture

Well-balanced light umami with moderate fat. Versatile — sashimi, salt-grilled, or fried. In season twice: spring to early summer (fattiest) and autumn (firmer flesh)

Season

MONTHLY AVAILABILITY

May - Aug

PEAK

※ Season is based on domestic field-grown availability

How to Choose

  • Clear eyes, bright red gills, firm flesh.

  • Distinct 'zeigo' (scutes near the tail) indicates freshness.

How to Store

  • Remove entrails, wrap in paper towels, refrigerate 1-2 days.

  • Fileted and frozen, keeps 2 weeks.

Shelf life 1-2 days refrigerated; about 2 weeks frozen

Nutrition Facts

Monthly Supply Volume

Supply Peak

Peak Month 4 5,485t
Annual Inflow 41,337 t
Inflow (t)
In season

Source: MAFF Seafood Distribution Survey (monthly cold-storage inflow) (2024). Monthly cold-storage inflow — used as a supply-signal proxy when national monthly wholesale prices are not published.

Retail Price

Price Trend

Cheapest Jun ¥123/100g
Most Expensive Jan ¥151/100g

Annual Average

¥138/100g

Source: Statistics Bureau Retail Price Survey (2026)

Top Landing Prefectures

Nagasaki41.0%
Shimane10.4%
Miyazaki9.6%
Ehime4.1%
Kochi3.7%
Others31.2%
10%+
5%+
2%+
0.1%+
None

Map data: National Land Numerical Information (MLIT Japan)

#
Prefecture
Production (t)
Share
1
46,005
41.0%
2
11,666
10.4%
3
10,775
9.6%
4
4,630
4.1%
5
4,201
3.7%

Source: MAFF Marine Fisheries Production Statistics (wild catch) (2023)

Top 5 Prefecture Production Trends (2018-2023)

Nagasaki
Shimane
Miyazaki
Ehime
Kochi

Consumption Ranking

National Average (annual spending per household)

¥911 /year
#
City
Annual Spending
1
Yamaguchi Yamaguchi
¥2,315
2
Nagasaki Nagasaki
¥2,308
3
Miyazaki Miyazaki
¥2,019
4
Matsue Shimane
¥1,971
5
Saga Saga
¥1,529

Source: Statistics Bureau Family Income and Expenditure Survey (2024, two-or-more-person households, prefectural capital cities)