This was the first Japan-Hong Kong co-production.
This was the only foreign language film released in the United States by Buena Vista Film Distribution (owned by Walt Disney Productions)
Yamiko Kyo was doubled for the bathtub scene by a stripper, as it was considered unthinkable that she should be seen in person in the nude.
Lloyd Kaufman has called this his favorite film, stating that he has only viewed the film once as it was such a powerful experience that he feels that he will never equal it (he compared the experience to losing one's virginity).