Kokusai himitsu keisatsu: Kagi no kagi (国際秘密警察 鍵の鍵, "International Secret Police: Key of Keys"), also known as Key of Keys, is a 1965 Japanese comedy-spy movie directed by Senkichi Taniguchi. It is the fourth installment of five movies in the Kokusai himitsu keisatsu series, a parody of James Bond-style spy movies.