What Yu Aida calls the MP was just Lost in translation ?

I think Yu, and at least the majority of his readers, understand that, especially considering the connection between the Croce bothers and the Carabinieri.

Yu Aida is very meticulous in his research, so I am quite confident he knows the function and structure of the Carabinieri.

Any confusion would be with the readers of his work, and they can educate themselves relatively quickly with a quick web search.

Aida actually used several words which can all mean "military police", 憲兵 (kenpei) and 軍警察 (gunkeisatsu). The first one is directly related to the WWII kenpeitai, which was more of a military police force that acted instead of conventional police officers, a more omnipresent gestapo that was sometimes called the "patriotism police", to crush dissent and intimidate anyone thinking of acting against the government. The Carabinieri also fulfilled this role in fascist Italy. The name for this kind of military police force is normally referred to as a "gendarmerie", but that name also extends to things like Canadian mounties.

The second word is a literal combination of "military" or fighting force (軍, gun) and "police" (警察, keisatsu). That word could be used to describe modern military police forces that are literally just a police force that polices the military itself. Since Aida uses the former term more chiefly, though, there's not much doubt what he is talking about to a Japanese reader. Unfortunately, there's only one term for this kind of thing in English-speaking areas. Most readers seem to be able to discern what they mean, though. In hindsight I could have maybe used the term Carabinieri in the chapters I translated to be more specific, but Aida certainly didn't screw it up, at least not in Japanese.

I would also like to add that Yu Aida not only did his research, the general consensus amongst some at least is that he must have spent some length of time in Italy to really get so many small details down very accurately. The fan information pages at the end of the chapters and volumes many times are details on differences between Japanese and Italian culture. You could read about these things I suppose but Aida's knowledge doesn't seem like it was vicariously obtained.

Ok, thanks for the infos.

In fact, in some versions, like the the French one (manga and anime), sometimes, they speak about the "military police", sometimes about the "gendarmerie" and sometimes about the "carabiniers" for the same thing each time. So i felt that strange and i thought it was a problem of translation, or the fact that Yu Aida lives in a country where this sort of unit don't exist, so he had to use others words (wich could create confusion sometimes), to explain what he was talking about. That's the reason i put this topic.

Well he could have used a more appropriate term like Gendamerie, which is sort of an umbrella term for para-militaries like the Carabinieri, but most English-speaking users would go, "Huh...?" and it'd probably be something best explained with a manga footnote. Military police isn't exact, but it is close without making the reader pause and google some of the terminology.