chub mackerel
Refers specifically to the chub mackerel (Scomber japonicus), often contrasted with 真鯖 (masaba) in culinary or fishing contexts.
See also: マサバ
Chub mackerel is fatty and delicious.
Compound of 本 (hon, 'true, main') and 鯖 (saba, 'mackerel'), distinguishing it from other mackerel species.