Honkon no yoru (1961)

Hiroshi Tanaka is a Japanese journalist on assignment in Hong Kong who meets and falls in love with Wu Li Hung. He proposes to Wu Li but she rejects him because of her distaste for mixed marriages (her mother was Japanese but deserted her family and returned to Japan during WWII). Tanaka locates Wu Li's mother and unsuccessfully tries to reunite them, but eventually Wu Li accepts his proposal. A joyous Tanaka flies off to Laos to finish an assignment but on the eve of his wedding he is killed there.