History AdaptationExpansion / AnimeAndManga

** Other examples are ''Anime/ADogOfFlanders1975'' and ''Anime/AkageNoAnne'' whose stories are not only adapted faithfully, but lots more characters, stories, and conflicts are added, all the way down to really tiny details most people wouldn't even notice thanks to those stories being [[GermansLoveDavidHasselhoff immensely popular in Japan]].

** Other examples are ''Literature/ADogOfFlanders'' and ''Literature/AnneOfGreenGables'' whose stories are not only adapted faithfully, but lots more characters, stories, and conflicts are added, all the way down to really tiny details most people wouldn't even notice thanks to those stories being [[GermansLoveDavidHasselhoff immensely popular in Japan]].

** The extra chapter for the adaptation of ''VideoGame/TheLegendOfZeldaMajorasMask'' provides an origin story for the titular mask, told in style similar to real-life ancient myths. The tale is of an evil beast named Majora, who was defeated by a traveller who played a bongo for three days straight, causing Majora to go into a trance and dance until it drops dead. The traveller then carved the mask from the beast's armor, sealing the evil spirit away inside said mask forever.

* The original ''Franchise/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.)

** ''Anime/SailorMoonCrystal'' attempts to expand the roles of the Four Heavenly Kings in its first story arc, keeping them alive past the points of their canon deaths in order to introduce a plot point regarding their romantic involvement with the Sailor Guardians in their past lives. Since ''Crystal'' is a TruerToTheText adaptation which otherwise follows the manga scene for scene, this subplot doesn't go much of anywhere before they are unceremoniously killed off in the buildup to the finale.

* ''Anime/EntakuKishiNoMonogatariMoeroArthur'': Uriens gets more focus here (when in most incarnations of the myth, he's subjected to ChuckCunninghamSyndrome). Here, he is Lancelot's foster father and warns Rothwick about taking the throne from the legitimate heir.

* 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.
* The manga for ''Manga/WelcomeToDemonSchoolIrumaKun'' has a bit of a pacing issue, often rushing through the story and having some important events happen completely offscreen, with many plot-important details being revealed right before the moment they're important, the only thing guaranteed focus being the comedy. The anime adaptation slows things down considerably, greatly expanding on content from each chapter, even moving some manga content around to places where they fit into the story better.

* ''Manga/YuYuHakusho'' has several instances of expansion from the manga, as minor plot points can become mini-subplots. In the anime adaptation of the Yukina arc, part of the pressure is to get to Yukina and prevent Hiei from killing Tarukane out of anger, and Hiei is shown prepared to kill Tarukane before Yukina stops him. In the manga, Botan only mentions that it was good that Hiei did not kill Tarukane, or else they would have to arrest him for killing a human, and Hiei only punches Tarukane once after finding him, saying that Yukina is worth more than he is. Come on, Hiei! You can't kill the guy, but readers probably wouldn't blame you for attempting it, considering what Tarukane is...
* The anime ''Anime/UFOWarriorDaiApolon'' is derived from the manga ''Galactic Warrior Apolon'' by Tetsu Kariya and Shigeru Tsuchiyama, but adds in HumongousMecha and American football aspects.

* ''Manga/OnePiece''
** 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 many ideas that aren't essential to keeping the story moving. These concepts often make it into the anime.
*** The anime also fully covers the fates of the other eight Straw Hats following [[spoiler:their defeat by Kuma]] presented while Luffy was traveling to Impel Down.
*** They also show Rob Lucci's backstory in frightening detail.
*** The anime also adapts the cover illustrations for Chapters 35-37, 39, 42-43, 46-48, and 50-51, which chronicle Buggy after his defeat at the hand of Luffy, from the time he is nearly eaten by a giant bird, to when he meets Gaimon, and the first time he joins forces with Alvida into two full-length episodes.
*** Many of the major fights Post-TimeSkip have been expanded, most likely for two reasons: 1. padding, and 2. so that the villains don't suffer under TheWorfEffect so badly like they do in the manga.
*** Brook looking for milk before going back to fight Oars in the Thriller Bark Arc.
*** In the manga, Zoro's past is revealed in the form of a brief flashback with a few scenes. The anime expands it into an entire episode just before the start of the Baratie arc and includes additional scenes, such as when Zoro first came to the dojo.

* ''Anime/PokemonTheSeries'' is a shining example, having perhaps a whole two-thirds of the episodes being content added into the world provided by the games. In fact, they did a 36-episode ''story arc'' based outside of the established worlds (The Orange Islands -- the ''second'' season, no less!)

* While the ''Anime/AceAttorney'' anime is mostly a CompressedAdaptation, several details are expanded upon more than in the games:

* ''Manga/TheLegendOfZeldaTwilightPrincess2016'':
** Link is given an expanded backstory as a refugee from a town swallowed by the Twilight Realm. Instead of living in Ordon Village his whole life, he only came to try to start a new life for himself.
** It is revealed that Zelda and Midna communicated with each other for a time through a portal as children and become friends.
** A flashback shows how Ilia escaped the Bulblins; after losing his first fight with Link, King Bulblin barged into her cabin. Delirous from his wounds, he passed out and gave her a chance to run.

* ''Manga/TheLegendOfZeldaAkiraHimekawa'': The extra chapter provides an origin story for the titular mask, told in style similar to real-life ancient myths. The tale is of an evil beast named Majora, who was defeated by a traveller who played a bongo for three days straight, causing Majora to go into a trance and dance until it drops dead. The traveller then carved the mask from the beast's armor, sealing the evil spirit away inside said mask forever.

* ''Manga/SoulHunter'': The 1999 anime does this a lot. For example in the manga, we barely spend time with [[spoiler: sisters Kashi and Koushi before they commit suicide]]. The anime spends more time with them.