Whilst we're on the subject of police depts., what is the O-kei (excuse the bad translation) dept and what is that equivalent to (roughly) in the American system (i say american only because their crime dramas are pretty much seen in most countries and hence the better chance of possibly relating it to something).
Would i be correct in saying that the members of the O-kei force are meant to be more elite than the members of the CIU??