Sister Street Fighter – Fifth Level Fist is one of those bizarre instances when a film is named after a series of films in which it has no story or character ties too. This time Shihomi is Kiku Nakagawa, the daughter of a wealthy, upwardly mobile kimono shop family in Kyoto. Though her ambitious, upwardly mobile mother wants to train Kiku in delicate arts like flower arrangement and marry her off to a wealthy family, she's much more interested in karate. Trouble erupts when the stepbrother Jim (Ken Wallace) of her Okinawan friend Michi (Michi Love again), she born of the same mother but a different father, becomes involved with the "largest drug ring since World War II!" Unbeknown to Michi, Jim's trying to raise cash for a long dreamed-of restaurant by working part-time as one of the drug ring's assassins. The film's novelty is that the drugs, first stashed away in fresh fish then hidden in cheap, exported statues of Buddha, are being channeled through the drug ring's ingenious if highly improbable front: a movie studio. Yes, "Hollywood producer" Joe Spencer (Claude Gagnon, later a writer-director-producer in real life) and studio mogul Fujiyama (Nobuo Kawai) are actually shipping heroin to America to buttress Japan's declining film industry! Also on the case is male chauvinist Detective Suji Takagi (Tsunehiko Watase), a man whom Kiku's uneducated father (Masafumi Suzuki) would like to see marry his little girl.
