Out of Japan's 220,000 police officers, only 500 are professional investigators. This comparison alone shows the difficulty of passing such an exam.,While relying on the fact that he gained memories directly after crossing over, another version of himself should also be able to gain his memories. That way, being a translator and making life easier would certainly be enough.,Apart from the aforementioned salary, if a police officer is unmarried, the Metropolitan Police Department requires them to reside in the designated single dormitory.。