- Fake Nationality: Ricardo Montalban, born in Mexico to Spanish immigrants, plays a Japanese character.
- Mid-Development Genre Shift: Joshua Logan originally wanted to adapt the novel into a Broadway musical. When that didn't pan out for legal reasons, it became a straight drama.
- Wag the Director: 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.
- What Could Have Been:
- Audrey Hepburn was offered the role of Hana-Ogi 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."
- William Holden was originally slated to play Ace Gruver, but left the project to film The Bridge on the River Kwai. Other candidates included Montgomery Clift, Kirk Douglas, Glenn Ford, James Garner, Rock Hudson, and Paul Newman.
- Amongst those considered for Mike Bailey was Ronald Reagan.
- Burt Reynolds auditioned for this movie, but was told he could not be in the film because he looked too much like Marlon Brando.
Trivia / Sayonara