History Trivia / DemonSlayerKimetsuNoYaiba

* DiedDuringProduction: Creator/PhileceSampler, the voice of Rokuta Kamado in the English dub, died as the second season was being produced after suffering a fatal heart attack. It remains to be seen if the role will be recast; her last dialogue as Rokuta was in Tanjiro's dream begging not to leave.

* IKnewIt:
** [[spoiler: Some people have predicted that Muzan would turn Tanjiro into a demon in Chapter 201.]]
** Some also predicted [[spoiler: the transformation won't be permanent, due to the manga ending announcement earlier.]]

* RealLifeRelative: For the Latin American Spanish dub of ''Mugen Train'', Enmu is voiced by Arturo Castañeda, while his parents Mario Castañeda and Rommy Mendoza voice Shinjuro Rengoku and Ruka Rengoku, respectively.

** Due to Laura Post severing ties with Crunchyroll it's currently unknown who will voice Tamayo in future seasons.

* DevelopmentGag: In the one-shot that predated ''Kimetsu no Yaiba'', ''Kagarigari'', the protagonist was a demon slayer who passed the Final Selection at the cost of his right arm. He bore a resemblance to [[spoiler:Giyu Tomoka]] in both appearance and personality. By the end of the series, [[spoiler:Giyu loses his right arm in the final fight against Muzan]], adding to the resemblance.

* WhatCouldHaveBeen: Before ''Demon Slayer'' became serialized, Gotouge Koyoharu made a one-shot that set the foundation of the final story's premise. ''Kagarigari'', released in 2013, featured a lone demon slayer who greatly resembles Giyu in appearance and personality fighting against prototypical versions of Muzan, Tamayo, and Yushiro, alongside a demon who never made it to the final story. ''Kagarigari'' was a more serious horror mystery, a kind of manga that Gotouge's then-editor didn't have much faith in running in ''Weekly Shonen Jump''. With a new editor years later, Gotouge reworked ''Kagarigari'' into ''Kisatsu no Yaiba'' ("Demon-Killing Blade"), gave the demon hunter a goal in finding a cure for his demon sister, and added levity and humor, with a colorful cast of characters to bounce of the now optimistic protagonist. With Gotouge changing the name from ''Kisatsu no Yaiba'' to '''Kimetsu no Yaiba''' (''Kimetsu'' being a made-up word Gotouge felt the audience would remember better), the ''Demon Slayer'' manga as we know it was born.

* AllStarCast: The Japanese, English, and Latin American Spanish casts have big names for both major and minor characters. However, there are too many to list due to the number of characters. This is actually pretty noticeable in the original Japanese cast: going through the casting list in the [[Characters/DemonSlayerKImetsuNoYaiba Characters page]], a whole lot of the supporting cast and even one-shot characters are voiced by veteran ''{{seiyuu}}''. Hell even the main characters (except for Creator/AkariKitou, who had her StarMakingRole as Nezuko) were voiced by already well established seiyuu.

* WhatCouldHaveBeen: The first Databook details the planning phases Gotouge Koyoharu and their editor went before the series was serialized; the original '''Kagarigari''' One-Shot chapter released in 2013 containing the foundation of what the final series turned out to be a few years later was denied the chance to become a serial due its serious horror mystery tone, the editor that evaluated Kagarigari at the time didn't have faith in that type of series running in Weekly Shounen Jump, with a lone, sour, completely scarred (missing limbs even) hunter going against the horrors of night; thus with another editor years later Gotouge went back and reworked Kagarigari in what was planned to become '''Kisatsu no Yaiba''' (Demon Killing Blade), introducing a demon sister to the once lone demon hunter, as a living dilemma to his search for a cure while killing demons on the way, and moments of levity and humor with more colorful characters making company to the now more hopeful and nice protagonist; the basis for what the final series became was set, the only thing left was changing ''Kisatsu no Yaiba'' to '''Kimetsu no Yaiba''' (Demon Destroyer Blade), with ''Kimetsu'' being a made-up word the editor felt japanese audiences would remember the uniqueness of it. The series as it became turned into a modest success in its first 2 years of publication, growing into records-breaking behemoth after the anime adaptation had finished its first season during the series 3rd year of publication, on the way of ending serialization on the 4th year.

* ActingForTwo/DemonSlayerKimetsuNoYaiba

* ActingForTwo: Notable examples in the English dub include:
** Creator/AbbyTrott voicing Nezuko, Chuntaro, [[spoiler:the Hand Demon's deceased brother]], and Koto Shinazugawa
** Creator/AllegraClark voicing the Mother Spider Demon and a child Tanjiro.
** Creator/BriannaKnickerbocker voicing Kanao, Nichika Ubuyashiki, and Teiko Shinazugawa
** Creator/BridgetHoffman voicing Kanae Kocho and Rui's mother.
** Creator/CristinaValenzuela makes bank during the Swordsmith Village arc, voicing Suyako Kamado, Mrs. Tokito, Hiroshi Shinazugawa, the female Kakushi who accompanied Tanjiro to the swordsmith village, as well as Muichiro and Mitsuri's Kasugai crows: Ginko and Urara.
** Creator/DerekStephenPrince voicing Goto and the Elder Brother Spider Demon.
** Creator/DorothyEliasFahn voicing Kie Kamado and Ozaki.
** Creator/EricaLindbeck voicing the Elder Sister Spider Demon before returning two seasons later as Daki.
** Creator/ErikKimerer voicing Iguro Obanai and the boy who entered Zenitsu's spiritual core.
** Creator/GriffinBurns voicing Muichiro Tokito, [[spoiler:and his deceased twin brother Yuichiro.]]
** Creator/JeannieTirado voicing Kotetsu and Shuya Shinazugawa.
** Creator/JessicaDiCicco voicing Shigeru Kamado and a human [[spoiler:Hand Demon.]]
** Creator/KimberlyWoods voicing Hinaki Ubuyashiki and and Naho Takada.
** Creator/KiraBuckland voicing Mitsuri Kanroji and Lower Rank 4 Mukago.
** Creator/KirkThornton voicing Tanjuro Kamado, the Hand Demon, the cocky Demon Slayer killed by Rui, and the Mugen Train conductor.
** Creator/KyleHebert voicing Kozo Kanamori, Rui's father, and Muzan's doctor.
** Creator/LauraPost voicing Tamayo and Sumi Shinazugawa
** Creator/LucienDodge voicing Kazumi and returning to voice Akaza.
** Creator/MatthewMercer voicing Kagaya Ubuyashiki, the fat and long-lounged demon from Tzumi Mansion, and boy who entered Tanjiro's spiritual realm.
** Creator/MelaLee voicing Kanata Ubuyashiki and the girl who entered Rengoku's spiritual realm.
** Creator/RayChase voicing Tengen Uzui and Lower Rank 2 Rokuro.
** Creator/RyanBartley voicing Hanako Kamado, Makomo, a young Kyojuro Rengoku, and the Asakusa Demon's wife.
** Creator/SuzieYeung voicing Amane Ubuyashiki and Ruka Rengoku.
** Creator/XantheHuynh voicing Tokie and Muzan's "daughter."
** Creator/ZachAguilar plays the lead role as Tanjiro, but also voiced the Slasher from episode one of the Mugen Train season.
** Creator/ZenoRobinson voicing Genya and the Asakusa Demon.

* DiedDuringProduction: Creator/PhileceSampler, the voice of Rokuta Kamado in the English dub, died as the second season was being produced after suffering a fatal heart attack. It remains to be seen if the role will be recast, and it is also unknown if she recorded any lines for the role.

** Toshikuni's adopted mother is voiced by Emo Lo in the Entertainment District arc before being replaced with Vivian Lu in the [[BackForTheDead Swordsmith Village Arc]].

** Creator/AbbyTrott voicing Nezuko, Chuntaro, and [[spoiler:the Hand Demon's deceased brother.]]

** Creator/BriannaKnickerbocker voicing Kanao, Nichika Ubuyashiki, and a female spider demon [[spoiler:betrayed by the Elder Sister Spider Demon.]]

** Creator/CristinaValenzuela voicing Suyako Kamado, as well as Muichiro and Mitsuri's Kasugai crows: Ginko and Urara.

** Creator/KirkThornton voicing Tanjuro Kamado, the Hand Demon, and the cocky Demon Slayer killed by Rui.
** Creator/KyleHebert voicing Kozo Kanamori and Rui's father.

** Creator/MatthewMercer voicing Kagaya Ubuyashiki, the tongue and fat demon in the Tzumi Mansion.

** Creator/RyanBartley voicing Hanako Kamado, Makomo, and a young Kyojuro Rengoku.

* ChildrenVoicingChildren: In the Latin American Spanish dub, Hanako Kamado is voiced by then 10-years old Bonnie Miuller.

** Played straight in the English dub where Kotetsu is voiced by Creator/JeannieTirado, but averted in the original Japanese version where he is voiced by Creator/AyumuMurase.

** In the Latin American Spanish dub, Senjuro is voiced by Ileana Escalante.

** Creator/KyleHerbert voicing Kozo Kanamori and Rui's father.

** Creator/Kira Buckland voicing Mitsuri Kanroji and Lower Rank 4 Mukago.

** Creator/KirkThorton voicing Tanjuro Kamado, the Hand Demon, and the cocky Demon Slayer killed by Rui.

** Creator/Lucien Dodge voicing Kazumi and returning to voice Akaza.

* TheOtherDarrin: In the Latin American Spanish dub, due to the death of Osvaldo Trejo as Genya Shinazugawa, he is replaced with Luis Fernando Orozco in the next season.
* PlayingAgainstType: Creator/BrycePapenbrook as Inosuke is very different from his usual roles, sporting a much deeper and raspier voice.

* TheWikiRule: [[https://kimetsu-no-yaiba.fandom.com/wiki/Kimetsu_no_Yaiba_Wiki Kimetsu no Yaiba Wiki]].

* {{Woolseyism}}: The ninth flame breathing style, ''Rengoku'', obviously didn't really need to be translated, since it's named after its user. However, the Norwegian sub translated it into Skjærsild. Most commonly translated to Purgatory, but more accurately "The fire that burns away sin". ''Very'' appropriate for a technique used to kill demons.