Audrey Hepburn was offered the role of a Japanese bride opposite Marlon Brando but turned it down. She explained that she "couldn't possibly play an Oriental. No one would believe me; they'd laugh. It's a lovely script, however I know what I can and can't do. And if you did persuade me, you would regret it, because I would be terrible."

Also according to Turner Classic Movies, Marlon Brando insisted on playing Ace Gruver with a Southern accent, against the will of the director and producers. Brando adopted a nondescript Southern accent for Gruver, despite the objections of director Joshua Logan, who didn't think that a general's son who was West Point-educated would speak that way.

Marlon Brando was not the first choice for the lead role. It was offered to Rock Hudson, but he chose to make A Farewell to Arms (1957) instead.

According to Turner Classic Movies, William Holden was originally slated to play Ace Gruver, but left the project to film The Bridge on the River Kwai (1957).

In 1956, more than 10,000 American servicemen had defied regulations and married Japanese women, as indeed had the novel's author, James A. Michener.

Miyoshi Umeki's Academy Award win for Best Supporting Actress made her the first Asian actor to win an Oscar. Also, as of 2010, she is the only person of East Asian descent to win an Academy Award for acting.

Dennis Hopper dubbed the voices for a few of the minor characters in the movie.

Burt Reynolds auditioned for this movie.

The "Matsubayashi Girls Revue" stage shows in the film were performed by the Shochiku Kagekidan Girls Revue.

The only Best Picture Oscar nominee that year to be also nominated for Best Art Direction.

Film debuts of Miiko Taka and Miyoshi Umeki. Umeki, for this debut performance, won the Best Supporting Actress Academy Award.

Film debut of James Stacy.

Red Buttons's Best Supporting Actor Oscar win over Sessue Hayakawa was the only one of eight categories that Best Picture Oscar winner The Bridge on the River Kwai (1957) lost at the Academy Awards.

Features the only Oscar nominated performances of Miyoshi Umeki and Red Buttons, both of whom won in their respective categories.

As the major goes up the stone steps to meet Hana-Ogi, you can see him twist his ankle on or about the third step.

The medal ribbons worn by some of the characters are as follows (reading left to right, top to bottom): Major Gruver Silver Star, (unknown). Air Medal, Bronze Star, Army Commendation Medal (??), American Campaign Medal., Medal for Humane Action, Korean Service Medal, United Nations Korea Medal. On his right he wears a blue ribbon in a gold frame - a Presidential Unit Citation for the Air Force, Joe Kelly Korean Service Medal, United Nations Korea Medal General Webster Distinguished Service Medal?, Silver Star, (unknown), Army Commendation Medal, Purple Heart, Navy Expeditionary Medal (??), (unknown), Army of Occupation of Germany Medal, (unknown), American Campaign Medal., European-African-Middle Eastern Campaign Medal (with three stars), National Defense Service Medal, Army of Occupation Medal, (unknown), Order of the British Empire (for services during World War II?), (unknown), (unknown) It is interesting to note that General Webster has no medals for service in Korea. (Source: Wikipedia)