!!The Japanese films:

* TheOtherDarrin: Sadako is played by a number of actresses over the years - Rie Inou (''Ring'', ''Ring 2''), Hinako Saeki (''Rasen''), Yukie Nakama (''Ring 0''), Ai Hashimoto (''Sadako 3D''), Ayane Miura (''Ring Kanzenban''), Tae Kimura (''Ring: The Final Chapter''), and Akiko Yada (''Rasen'' TV series).
* PropRecycling: The "COPY" tape from the 2002 remake is the actual "COPY" tape from the 1998 original.
* SequelGap: Koji Suzuki took a hiatus from writing the series after the publication of the anthology novel ''Birthday'' in 1999. The next sequel, ''S'', wasn't published until ''13 years later'' in 2012, coinciding with its film adaptation, ''Sadako 3D''. This is reflected in-universe: the protagonist is 28-year-old Takanori Ando, whom we last known was a [[spoiler: [[BackFromTheDead resurrected]]]] 3-year-old boy in ''Spiral''.
* TechnologyMarchesOn: Cursed ''videotape''. Though ''Sadako 3D'' gets around this, by having the curse apparently spread via WebVideo. And now smartphones as of ''Sadako 3D 2''...

!!The American Remakes:

* ActorAllusion: Brian Cox plays Richard Morgan, [[spoiler:whose wife killed herself because their (adopted) child's uncontrollable psychic powers burned horrific images into her mind]]. One year later, in ''Film/X2XMenUnited'', Brian Cox plays William Stryker, [[spoiler:whose wife killed herself because their (mutant) child's uncontrollable psychic powers burned horrific images into her mind]].
* BillingDisplacement: Brian Cox only has about four minutes of screen time, and doesn't appear until around an hour in. He's billed fourth in the credits.
* DeletedScene:
** Samara's [[spoiler: murder at the hands of her mother]] was far more graphic and detailed. [[spoiler: The bag failed to subdue her, leading Anna to first try hitting her with a rock (which can be seen lying on the ground in some shots) and finally bashing her head against the well]].
** Rachel would ask some fishermen on the island about the Morgans, and they replied that they would never catch anything whenever Samara was around.
** A different version of Rachel and Ruth talking at the wake. Rachel searches Katie's room, finding the ticket for photos, then she and Ruth discuss information Ruth got from Katie's friends. Ruth would angrily pull the closet door open, explaining that's where she found Katie's body.
* FakeAmerican:
** Rachel is played by British-born-Aussie Naomi Watts, while Noah is played by New Zealander Martin Henderson.
** The sequel has Australian Simon Baker playing the American Max.
* FollowTheLeader: After the success of this, numerous other Japanese horror films were given American remakes such as ''Film/TheGrudge'', ''Film/DarkWater'', ''Pulse'' and ''Film/OneMissedCall''.
* GenreKiller: This film, together with ''Film/TwentyEightDaysLater'' that same year, effectively read the obituary for the teen horror genre of the mid-late '90s, and arguably for the {{slasher|Movie}} genre as a whole. While it was rated PG-13, it removed its DecoyProtagonist teenage characters from the picture after the opening scene and featured adult protagonists from there on out, while also eschewing the body-count slasher formula. Both it and ''28 Days Later'' were {{sleeper hit}}s that were widely acclaimed by critics and horror fans, and teen horror and slashers, which were already on life support by that time, mostly faded out in the '00s.
* ShrugOfGod: In the American remake, fans of the film note that the victims of Samara look like they'd been drowned, which would make sense considering Samara's predicament. However, both Gore Verbinski and makeup FX artist Dick Smith said that wasn't their intention. They just wanted to make them look creepy.
* SleeperHit: The filmmakers telegraphed this one. It was released in limited theatres one weekend before Halloween, with the plan that if it did well then they could expand it just in time for Halloween. They also edited some of the blood and graphic imagery to get a PG-13 rating. It worked, and the film is now the highest-grossing horror remake in history.
* WhatCouldHaveBeen
** The original ending had [[spoiler:the video getting placed in a video store dropbox and placed on a shelf of recommended videos. This would have implied that the Ring virus would spread across Seattle and possibly the entire country.]]
** In a deleted scene, Noah finds the innkeeper's corpse in the middle of the lake near the cabins. It is hinted he had watched the videotape and tried to flee Samara.
** There was a storyline where Rachel shows the tape to a death row prisoner played by Chris Cooper. This was dropped, but a newspaper article about Cooper's character can still be seen.
** The creators of the American version also had plans to include an all-CG scene which takes place [[TechnologyPorn inside a VCR]] when the cursed videotape is created. This never went beyond pre-visualization, although some of it is seen in the trailer.
** For the American version, a card announcing Samara's birth was made, but it didn't appear in the film.
----