I love catching bonito and use them for fishing baits plus eating.
If you are to keep the fish for the table you need to treat them in the same way as tailor,bleeding and icing down asap.Don,t bother buying them from the fish shops as they are just good for crab bait in my opinion.
Cooking.(few options i use.)
I cut the fillets off and put in the smoker ,then i toss the white meat flakes into a salad.
De boned,skinned and i also slice out the dark meat through centre of fish is great steamed or fish cocktails.
Sashimi is definately awsome with these fish if used the same day.
Chris.