私服刑事 しふくけいじ Meanings Noun plainclothes police officer; plain-clothes detective See also: 私服警官 (しふくけいかん). Kanji 私 private. Read as シ. 服 clothes. Read as フク. 刑 penalty. Read as ケイ. 事 matter. Read as ジ. Jinuma: Japanese Dictionary · Word lists