Spanish mack aka aji aka horse mackeral are rreat and popular in Japan.
Sashimi, sushi, grilled with rock salt, or fried
Here are some videos:
Sashimi
https://youtu.be/F98ZtxrFKB8
Fried aji and beer
https://youtu.be/XQ0teOjlFSA
Iron chef battle
https://youtu.be/1ywepqcf1vM
Sushi from some sushi joint
https://youtu.be/0z3r4v3asOs
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