This species is pelagic, oceanodromous, and found near shore (including semi-enclosed sea areas). It undergoes a spawning migration in spring (March to June) and a feeding migration in fall (September to November) in the Inland Sea of Japan. It feeds on small fishes. Larvae exhibited almost exclusive piscivory from first feeding in tanks (Shoji and Tanaka 2001, 2004).

Length of maturity at 50% is 60 cm fork length (FL) for females and 40 cm FL for males in Japan (Inoue et al. 2007). Longevity is estimated to be six years based on a growth study using scales in Japan (Kishida et al. 1985), and maximum length is 103 cm FL. Generation length is therefore estimated to be approximately 2–3 years.

Maximum size is more than 100 cm FL, 9.4 kg. The all-tackle game fish record is a 9.35 kg fish caught at Shirasaki, Wakayama, Japan in 2007 (IGFA 2011).

There are two migrations in the Inland Sea of Japan, a spawning migration in the spring (March to June) and a feeding migration in the fall (September to November) according to Hamada and Iwai (1967).

CCTCTATCTAGTATTCGGTGCATGAGCTGGAATAGTTGGCACAGCCCTAAGCCTGCTTATCCGAGCTGAACTAAGCCAACCAGGTGCCCTTCTTGGAGACGACCAGATTTATAACGTAATCGTTACAGCCCATGCCTTCGTCATGATTTTCTTTATAGTAATACCAATCATGATTGGAGGTTTTGGAAACTGACTTATCCCCCTAATGATCGGGGCCCCCGACATAGCATTCCCTCGAATGAATAACATAAGCTTTTGACTTCTACCCCCTTCCTTCCTCCTACTCCTCGCCTCTTCCGGCGTTGAAGCCGGGGCTGGGACTGGTTGAACAGTCTATCCTCCCCTTGCCGGCAATCTGGCTCACGCTGGAGCATCCGTCGACTTAACTATTTTCTCTCTTCACCTGGCAGGGATTTCTTCAATCCTTGGGGCAATCAACTTCATTACGACAATCATTAATATGAAACCCCCAGCTATCTCCCAATACCAAACACCCTTATTTGTGTGGGCTGTCCTAATTACAGCTGTCCTTCTTCTATTATCACTTCCAGTTCTTGCCGCTGGTATTACAATACTTCTTACAGACCGTAACCTAAATACAACCTTCTTCGACCCGGCAGGCGGAGGAGACCCAATCCTTTATCAACACTTA
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This species is taken throughout its range but is the most important Scomberomorus species in Japan. FAO worldwide reported landings show a gradual increase from 1,900 tonnes in 1950 to 60,685 tonnes in 2006 (FAO 2009). It is an important fishery in South Korea, where 40,000 tonnes were recorded in 2007, and where 50% of the global catch occurs. Reported landings in China may not be accurate.

Two different stock assessments have been conducted in the East China Sea and in the Inland Sea. In the East China Sea, this species is caught by purse seiners, and catch per unit effort (CPUE) since 1994 by Japanese purse seiners is increasing. In the Inland Sea, this species was very depleted in the past as estimated biomass in 1985 was 60,000 tonnes and dropped to 2,000 tonnes in 1998. There is a slight increase to 5,000 tonnes in 2007 based on recovery program that begin in 2002 with a restocking program (Uozumi pers comm 2009). In the western part of Japan, catches are increasing as this species is likely increasing its range because it used to be rare in this region. There are no major fisheries for this species on the eastern part of Japan.

In Taiwan, reported catches of this species to FAO have declined from 15,000 tonnes in 2007 to 1,400 tonnes in 2008, but this needs to be confirmed as catches are reported from distant water long-lines which are not normally used to catch this species (Chang, pers comm 2009).

Unknown

This is a highly commercial species caught with gillnets, purse seiners and set nets. This species is the most important Scomberomorus species in Japan, where it is cultured and released for fisheries.

This species is cultured and released in the Inland Sea in Japan. In Japan, there are regulations to control effort (including regulating the number of boats and catch size) as well as seasonal closures in the Inland Sea. However, more information on the harvest and population status of this species population is needed in China and Korea.