That's a Japanese "trading figure (sort of like sports trading cards)" boxed "toy", collectors never know which one they get because they're randomly packed and usually there's about 6 different versions (livery or mould) per collection. It is a 1/100 from Doyusha. Maybe some kind of assembly is required depending on the manufacturer.Here's one batch of them, but I don't see the one pictured above... this particular one seems to have been customised?
1/100 IJN Zero Fighter Type 21 Pearl Harbor 1 Box (12pcs)
Some even come with a pack of sweets or candies, therefore their other alias: "candy toys"...but the quality is amazingly good in some cases, for instance, I got a whole series of N-gauge "toy" buses (roughly 1/150) that were a lot cheaper than German railway models, and also way more detailed than those German-made expensive "models".
It's a hit and miss kind of thing, I remember purchasing some 1/200 F-4s and F-15s that were quite unremarkable (they're stored out of sight somewhere now).