!!The original film series has examples of:
* ActorSharedBackground:
** Tamlyn Tomita, like Kumiko, was born in Okinawa.
** Danny Kamekona was from Hawaii, where the movie was filmed.
* AFIS100Years100Cheers: #98
* DawsonCasting: Ralph Macchio was 21 when the first film was made, playing a 17 year old. He was 26 playing an 18 year old in the third film. Not many people noticed thanks to Macchio's boyish good looks and high-pitched voice,[[note]]although Macchio himself was very uncomfortable being romantically paired with the 16-year-old Robyn Lively in the third movie[[/note]] making this one of the few effective examples of the trope. Avoided in the reboot, as the kids are actual kids. Poked fun at in a 90's commercial for [[https://www.youtube.com/watch?v=-JpVJgSkGgk Brisk Iced Tea]].
-->'''"Daniel-San":''' Kid? I'm 35.
* ExecutiveMeddling: Thankfully avoided in the original film, the studio demanded that the quiet scene in which Daniel discovers a drunken Miyagi mourning his lost wife and child, who died in a relocation camp while he was away being a war hero in Italy during UsefulNotes/WorldWarII, be cut because it "disrupted the flow of the movie". The director apparently went to ''war'' to keep it in the film. Pat Morita would later say that it was this scene that earned him an UsefulNotes/AcademyAward nomination for his portrayal of Mr. Miyagi. (Ralph Macchio disagrees, citing his presence in the entire film as the reason.)
* ThrowItIn:
** The song drunkenly sung by Mr. Miyagi was one he heard when he was a child. This even gets worked into the second movie as being Miyagi and Yukie's old song.
** The song playing in the country club Daniel crashes in the first movie is heard again in the second movie, on the radio in the cab ride from the Okinawa airport. Neither occurrence is a plot point.
* TropeNamers: WaxOnWaxOff, and formerly "[[OrderedToCheat Sweep the Leg]]".
* WhatCouldHaveBeen: Creator/ChuckNorris was offered the role of Kreese, but he didn't want martial artists to be portrayed in a bad light (he would later play himself in Sidekicks, another [[FollowTheLeader movie with a Miyagi-like mentor and a Kreese-like villain]]). What's more, the studio wanted ToshiroMifune to play Mr. Miyagi despite not being fluent in English as he would have had to learn all his lines phonetically but writer Robert Mark Kamen was against that casting choice.
** Creator/{{Mako}} was offered the role of Mr. Miyagi but he turned it down to do ''Film/ConanTheDestroyer''. He did eventually play a similar character in ''Sidekicks''.

!!The animated series
* ScrewedByTheNetwork: Was given little to no promotion on Creator/{{NBC}} during its original run and was quickly axed after only thirteen episodes due to abysmal ratings.

!!The Video Game
* NoExportForYou: Inverted: Despise being programmed in Japan, the game was not released there. Not that the programmers or the Japanese audience cared about the game anyways.