History AdaptationExpansion / AnimeAndManga

** To a lesser extent, the anime also smooths over Araki's tendency to bring out major developments with little foreshadowing. Jotaro's future career in marine biology is hinted at when he's shown reading books on it in an anime only scene. Most notably, the BirthmarkOfDestiny in the manga was brought up only in Part 3 as a hasty retcon to show how all of the Joestars are related, while the anime draws it onto the protagonists of the early Parts, to show that it was there all along. Even Josuke was given a small scene in [[Manga/JoJosBizarreAdventureDiamondIsUnbreakable Part 4]] showing his mark in an episode that more strongly tied him into the family.

* The original ''Manga/SailorMoon'' anime expands 12- and 13-chapter manga arcs into entire seasons of 40+ episodes. Enemy generals ''really'' benefit from it, seeing their tenure extend over several MonsterOfTheWeek episodes and fleshing them out. (For example, the Four Phantom Sisters and the Amazon Trio were [[MonsterOfTheWeek MOTWs]] ''themselves.'' Instead, we get some of the best characters in the franchise out of them. Also, Jadeite was introduced in act one, commanded from behind the scenes in act two, and acted as the villain of the week and got reduced to a skeleton by one blast from the newly-minted Sailor Mars in act three. Animated Jadeite gets ''thirteen'' episodes and is a real threat.)

** The last episode of the anime add scenes to wrap up the end of the Full Bringers arc, particularly [[spoiler: a talk between Ichigo, Renji and Rukia after Ichigo goes retrieve Ginjo's corpse (Rukia didn't show up, only Renji)]] and a whole epilogue that shows both the Shinigami going with their lives ([[spoiler: i.e, it shows that Momo and Hitsugaya ultimately recovered from the horrible incident described above]]) and Ichigo happily returning home to his family and friends ([[spoiler: this includes Yuzu, his little sister who still can't see spirits -- her spiritually aware twin Karin points out where Ichigo's coming from so she can wave hello to him.]])
** In the manga version of the Thousand-Year Blood War arc, Rukia barely appears at all during the initial Seireitei invasion, with her Stern Ritter fight taking place entirely offscreen. While the anime doesn't show much of this fight either, it at least shows that it was Meninas she fought, and that she was defeated right after [[spoiler:Byakuya's bankai was used against him.]]

** A flashback shows how Ilia escaped the Bulbins; after losing his first fight with Link, King Bulbin barged into her cabin. Delirous from his wounds, he passed out and gave her a chance to run.

** ''Cucuruz Doan's Island'', an infamously poorly animated episode of the original series, was readapted to a film in 2022. Though the original episode was a standard-length 23 minutes, the film is 108 minutes long, with an appropriate expansion occuring. According to the film's director, he felt the plot could have used time to breathe, and so the film has a number of subplots and significantly more development for the titular [[TheDeserter Zeon deserter]]. The film also puts in some work to make the story work as a standalone film, mainly through extra scenes that help to get the audience familiar with the characters of the original.

** Instead of relying on filler arcs to provide padding, the anime eventually took to following a 1:1 chapter/episode pacing, expanding on and lengthening the already-present material. Creator/EiichiroOda has admitted that despite the manga being so long and stuffed with ideas and happenings, if he had his way there would be even MORE. His editors tend to make him throw out a lot of ideas which aren't essential to keeping the story moving. These concepts often make it into the anime.

* ''Manga/Touch1981'' goes through this, as might be expected from turning a 26-volume manga into a 101-episode TV series, three theatrical movies and two TV-movies.

* Like the Ranma example, the anime version of ''Manga/UruseiYatsura'' tend to extend some stories from the Manga,edited some stories to have a totally different plot or combine them with original stuff that wasn't in the Manga.

** Tanjiro's tragedy from losing his family is given more breathing room to show peaceful his life was before they all, except his sister, died; the following scuffle with his demon-turned sister and the slayer that came to kill her is expanded as well.

* ''Literature/FullMetalPanic'''s second season, ''The Second Raid'' does this, adapting two short novels into 13 episodes. The first four episodes take place before the novels even start, and add a considerable amount of background to the story. This mostly makes things better, by increasing the personal involvement of the characters in the plot. There's also the addition of entirely new characters, specifically, the fact that two forgettable male henchmen of the villain were [[GenderFlip replaced with]] beautiful twin sisters who play a fairly major role as rivals to the protagonists. Their first appearance was nude, together in the shower, then gradually getting dressed while being [[{{Twincest}} way too intimate]]. Because [[Creator/KyotoAnimation KyoAni]].

* ''LightNovel/FullMetalPanic: The Second Raid'' does this, adapting two short novels into 13 episodes. The first four episodes take place before the novels even start, and add a considerable amount of background to the story. This mostly makes things better, by increasing the personal involvement of the characters in the plot. There's also the addition of entirely new characters, specifically, the fact that two forgettable male henchmen of the villain were [[GenderFlip replaced with]] beautiful twin sisters who play a fairly major role as rivals to the protagonists. Their first appearance was nude, together in the shower, then gradually getting dressed while being [[{{Twincest}} way too intimate]]. Because [[Creator/KyotoAnimation KyoAni]].

* An unusual example of this trope is ''Anime/MobileSuitGundam'' when it is adapted into the manga ''Manga/MobileSuitGundamTheOrigin''. Being a 43-episode TV series, there's no shortage of source material, but the author, Yoshikazu Yasuhiko, did more than that -- he streamlined the original storyline while visiting many background events and character histories. This included [[WorthyOpponent Char]] [[AcePilot Aznable]] and [[TheChick Sayla]] [[ActionGirl Mass's]] childhood and exile, Char's subsequent enrollment in [[TheEmpire Zeon's]] military, the path to the One Year War (up to the Battle of Loum, where TheFederation's space fleet suffered a devastating defeat) and [[ReasonableAuthorityFigure General Revil's]] capture and escape. Yasuhiko's adaptation is quite popular in Japan and this expansion is praised by fans, and the manga is still ongoing.

** The [[Anime/FullmetalAlchemist 2003 anime version]] deviated from the manga on many points due to a huge case of OvertookTheManga (which was finished ''in 2010''), but even the ones where it stayed the same had additional scenes. The Liore arc, one of the more faithfully adapted ones, has several added scenes expanding on Rose's backstory, and shows Father Cornello and his minions giving the Elric brothers more trouble than they did in the manga. Some minor plots are expanded upon, as in the anime, Ed has a TenMinuteRetirement after [[spoiler:Nina's death]], during which he and Winry are captured by Barry the Chopper (whom the brothers don't meet in the manga until his soul is bound to a suit of armor) and Ed has to fight him to free himself and Winry and then help arrest him.

** The original LightNovel story of "Endless Eight" was a short story that tells the story of a GroundhogDayLoop and its resolution, as seen through the 15,498th and final iteration through the loop. The anime, on the other hand, aired eight episodes of this, which depict: (a) an unnumbered iteration where the protagonists don't realize they're in a time loop; (b) six nearly identical subsequent iterations with only cosmetic differences where the SOS brigade discover the loop but, contrary to the short story, ''don't'' manage to solve it; and (c) a final episode--iteration number 15,532--where Kyon finally manages to sever the loop and end the 595 years of repetition upon repetition.

* The ''Manga/CardcaptorSakura'' manga had nineteen cards, the anime had 52 -- which is appropriately serialized for a 52-episode anime setup (and even then, the anime got ''70'' episodes plus two movies). There were also new plot threads and the addition of Meilin.

AdaptationalExplanation in UsefulNotes/AnimeAndManga.

* The original webnovel of ''LightNovel/InfiniteGacha'' only has 6 races total, including humans. The light novel and manga have 9, adding dark elves, ghouls, and centaurs.

* ''LightNovel/AccelWorld''

* ''LightNovel/HaruhiSuzumiya'':
** The original LightNovel story of "Endless Eight" was a short story that tells the story of a GroundhogDayLoop and its resolution, as seen through the 15,498th and final iteration through the loop. The anime, on the other hand has aired eight episodes of this, which depict: (a) an unnumbered iteration where the protagonists don't realize they're in a time loop; (b) six nearly identical subsequent iterations with only cosmetic differences where the SOS brigade discover the loop but, contrary to the short story, ''don't'' manage to solve it; and (c) a final episode--iteration number 15,532--where Kyon finally manages to sever the loop and end the 595 years of repetition upon repetition.

* ''Manga/LuckyStar'' had a lot of new material added into the anime. It's especially notable for the many added {{Shout Out}}s, including ''all'' of the ''LightNovel/HaruhiSuzumiya'' references. Also, anybody who watched the first episode remembers, for better or for worse, the "how to eat certain foods" discussion that took up roughly half the episode. The manga's version of the discussion? Four strips, focusing on the choco-cornet.

* Inverted with ''LightNovel/{{Slayers}}'' and its original source of canon, the LightNovel series. The regular series is fifteen books long, and the first half is the basis for one manga series and two seasons of the anime. The ''Slayers Special[=/=]Smash'' novels take place before the original series. While four movies and six [=OVAs=] cover a good amount of Lina's prequel time, there are ''over thirty'' novels. As of this writing, ''Smash'' is on hiatus, but definitely not cancelled, so it won't end anytime soon. This creates some serious FridgeLogic when it's revealed that the ''Special[=/=]Smash'' series takes place over the span of two years, while the regular series spans roughly four.

* ''LightNovel/SwordArtOnline''