Heroes of the East (), also known as Challenge of the Ninja, Shaolin vs. Ninja and Shaolin Challenges Ninja is a martial arts film produced in 1978. It starred Gordon Liu and was directed by Lau Kar-Leung. Lau Kar-Leung has a cameo role as So Chan, a master of Zui Quan. It's notable for portraying Japanese martial arts alongside the more typical kung fu used in most Hong Kong martial arts films. Plot In Shanghai about the 1930s, Ho Tao (Gordon Liu) is a kung fu student. His rich father has set up an arranged marriage for him with the daughter of a Japanese business associate. Ho Tao initially objects and feigns illness, but soon thereafter agrees to the marriage when he finds bride to be, Yumiko Kōda ("Kung Zi" in Mandarin), is attractive. After the wedding, he finds out that she is also a martial artist. Ho Tao finds her style of karate to be violent, unladylike, and potentially immodest and tries to persuade her to learn feminine but also effectual styles of Chinese kung fu. She is later offended during an argument over which nation has the superior martial arts styles and eventually goes back to Japan. When he travels to Japan to entreat Kung Zi to be reconciled with her husband, Ho Tao's father finds Kung Zi in training by her childhood friend and rather too attentive martial arts sensei Takeno. As a ruse to bring her back to China, Ho Tao sends her a letter challenging Japanese martial arts and their inferiority to their Chinese roots. He hopes that the letter will infuriate Kung Zi enough to return to prove that her Japanese styles are as good as the Chinese ones. Once she is back in China, Ho Tao hopes to reconcile with her. But the plan backfires when Takeno reads the letter instead of Kung Zi. Takeno reads the challenge as an affront to Japanese martial arts and declares its contents with other Japanese martial arts masters who travels to China to take up Ho Tao's challenge. Takeno informs Ho Tao that he will face a different martial arts expert every day. In the first duel, Ho Tao misinterprets a respectful gesture from the Japanese fighter and thus further antagonizes the Japanese contingent. Due to this cultural misunderstanding, the Japanese no longer treat the subsequent duels as exhibitions of their styles but rather as all-out