私し服ふく刑けい事じMeaningsNoun1. plainclothes police officer; plain-clothes detectiveKanji used私private服clothes刑criminal punishment事occurenceComposed of私し服ふくordinary clothes (i.e. non-uniform); plain clothes; civilian clothes; casual wear; mufti; plainclothes police officerNoun刑けい事じ(police) detective; criminal matterNoun