The Return of the Sister Street Fighter (Kaette kita onna - Hissastsu-ken, 1975) benefits from the bit of breathing room between productions. It's no more original than its predecessor, but its relative brevity (just 77 minutes) and more assured hand make it the superior sequel.

 Back in Hong Kong, an old friend of Koryu's, Detective Cho (Jiro Chiba, Shinichi's brother), shortly before being stabbed right through the tie, asks Koryu to accompany his niece Rika to Yokohama and look for the little girl's mother, Shurei, who has become the mistress of Oh Ryu Mei (Rinichi Yamamoto), "shadow ruler of Yokohama's Chinatown," and whose "certain large Japanese corporation" is hoarding stolen gold. Quickly making contact with Suzy Wong, a prostitute at Oh's Yokohama nightclub-brothel (says one American sailor, "Whattya say we get it on, babe?"); and Shurei's sister, Reika, Koryu is also aided by superfluous fourth ally, Michi (Michi Love), a friend from Koryu's old dojo.

 Sitting on a massive wicker chair beneath a giant Chinese character for "Oh" (also meaning "king"), the crime lord watches his assassins in gladiator-like combat, from what looks like a Zulu warrior (though actually a Japanese in blackface) and an ancient Babylonian, as well as Ebikura (Masashi Ishibashi), a sneering killer-for-hire whose attire suggests a singularly unfashionable flamenco dancer. Oh offers his top assassins 10 million yen to the man who kills Koryu, with brazen party crasher Takeshi Kurosaki (Yasuaki Kurata, also in Hanging by a Thread) boastful that he's the man for the job.