Probably, most of Japanese people would choose this as one of autumn foods.
It is “Pacific saury”.
Pacific saury, (Sanma), is one of the most prominent seasonal foods representing autumn in Japanese. It is rich in nutrients, reasonable and many Japanese look forward to eating a saury in season.
It is most commonly served salted and grilled whole, garnished with daikon oroshi (grated mooli) with condiments include soy sauce, or lime, lemon or other citrus juices.
The intestines are bitter, but many people choose not to gut the fish, as many say its bitterness, balanced by the condiments, is part of enjoyment.