Out of Japan's 220,000 police officers, only 500 are professional investigators. This comparison alone shows the difficulty of passing such an exam.,During this era, because Japan had a fixed exchange rate with the US dollar of 360:1, consumption was incredibly expensive. Both meat and vegetables were very pricey.,Besides, I wonder if you've seen Monogatari Series, where Araragi Kun became a deputy police superintendent at 23 after graduating from university. His sister joined the police force as a patrol officer while still in high school.。