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is a Japanese
manga are comics or graphic novels originating from Japan. Most manga conform to a style developed in Japan in the late 19th century, and the form has a long history in earlier Japanese art. The term is used in Japan to refer to both comics ...
series written and illustrated by Kagiji Kumanomata. It has been serialized in
Shogakukan is a Japanese publisher of comics, magazines, light novels, dictionaries, literature, non-fiction, home media, and other media in Japan. Shogakukan founded Shueisha, which also founded Hakusensha. These are three separate companies, but ...
's manga magazine ''
Weekly Shōnen Sunday is a weekly manga magazine published in Japan by Shogakukan since March 1959. Contrary to its title, ''Weekly Shōnen Sunday'' issues are released on Wednesdays. ''Weekly Shōnen Sunday'' has sold over 1.8billion copies since 1986, making it ...
'' magazine since May 2016, with its chapters collected in twenty-nine volumes as of February 2025. An
anime is a Traditional animation, hand-drawn and computer animation, computer-generated animation originating from Japan. Outside Japan and in English, ''anime'' refers specifically to animation produced in Japan. However, , in Japan and in Ja ...
television series adaptation produced by
Doga Kobo is a Japanese animation studio formed by former Toei Animation members Hideo Furusawa and Megumu Ishiguro, located in Nerima, Tokyo, Japan. The studio was established on July 11, 1973, and is a subsidiary of Kadokawa Corporation. Although the st ...
aired from October to December 2020.


Plot

The story follows Princess Syalis, a young princess who was kidnapped by the Demon King, and her quest to sleep well while imprisoned. Despite the Demon King's best attempts, the princess turns her kidnapping into a vacation; having grown tired with the stress of a royal life, she is indifferent to the situation.


Characters

; : :Princess Syalis is a princess who was kidnapped by the demon king and causes chaos in the demon castle while trying to get a good night's sleep. She has been living at the demon king's castle for a year now due to her wishing to escape the stresses of royal life and making no intention to escape. Before long, she begins accepting the demon castle as her new home. ; : :The leader of the demon race, who is also the one responsible for abducting Syalis. He is usually annoyed by her antics and sometimes get dragged into them. Despite being the Demon Lord, he's not all that intimidating or ruthless. ; : :A demon priest who has the power to bring those who were killed back to life. Most of the time, he had to revive Syalis after she accidentally kills herself or those that she killed for her own means. Like Twilight, he also sometimes gets dragged into Syalis's antics. He seems to have feelings for Syalis as he gets very jealous when anyone else has feelings for her. ; : :Dawner is the hero who is entrusted by the Human Confederation of Goodereste with the task of saving Princess Syalis from the demon castle. Although Dawner and Princess Syalis are childhood friends and also engaged, she does not remember who he is. Whenever she mentions Dawner to the denizens of the demon castle, she calls him, "Daw-What's-His-Name". Due to Dawner being outgoing and friendly to Princess Syalis, yet being incredibly clumsy and prone to mistakes, he had always annoyed her, thus causing her to have nightmares when at one point he enters her dreams. He is also known for his poor sense of direction, which explains why Princess Syalis has been captured for a year, along with Syalis' unwillingness to escape. ; : :One of Twilight's henchmen. He resembles a porcupine. ; : :One of Twilight's henchmen. He resembles Frankenstein. ; : :One of Twilight's henchmen. ; : :One of Twilight's henchmen. ; : :Loyal retainer to the Demon Lord, in charge of enforcing rules. The princess drives him batty by her blatant disregard to the fact she's supposed to be a '' hostage''. In fact, later in the series, he notes that Princess is costing them a fortune with all her misadventures; adding onto the woe everyone endures. ; : :He and his subordinates are the principal victims of Princess Syralis's antics, especially when she needs cloth to make things to get a good sleep. The death of the Ghost Shrouds by the Princess is a common joke in the series. ;Ghost Shrouds :Monster Shroud's minions. ; : :A demon who has dominion over water. Because Poseidon never wears a shirt, the princess labels him a nudist. ; : :A demon who has dominion over fire. He always wears a mask. ; : :A gentle plant demon, whom has motherly concern for the Princess. While willing to overlook all the deaths the Cleric is forced to undo, Neo Alraune became "miffed" upon realizing her tree trunk brother killed by the Princess as part of one her usual ridiculous sleep plans. ; : :Spirit of a forbidden grimoire the princess freed by sheer dumb luck. Alazif tries encouraging Syalis to use his powers to defeat the demons and leave the castle; however, she is left severely disappointed with her due to her preoccupation with sleeping. ; : : A demon with an arm made of scissors. Syalis gave him her crown to keep his arm together in exchange for his lost scissors; unfortunately, leading to her routine of killing the ghost shrouds. ;Gearbolt :A scientist demon. ; : :A harpy who believes that the princess considers her a friend over a misunderstanding with Syalis wishing to nap on Harpy's feathers. ; : :Poseidon's older brother. Hades is always looking for chance to usurp the throne if Twilight messes up bad enough because of their mutual grudge. ; : :A sleep demon; he must sleep 20 hours a day or risk death. Hypnos was called to examine Syalis' nightmare at one point; revealing to the demons just how much the princess detests Dawner (the source of the nightmare). ; : :A succubus who looks eerily like the princess; only she has purple hair and gold eyes. Cubey wished to learn why the princess was so popular despite looking the same, but got sucked into being trained as her double. ; : :Nemlis is the queen of Goodereste, a kingdom of humankind, and mother of Princess Syalis. ;Teddy Demons :Living teddy bears with wings. Syalis keeps one as a pet and bribes them into giving her the keys to her cell in exchange for being brushed. They soon develop a good relationship with her. ;Morgan :A muscular paladin who works in Goodereste's castle. ;Evening Star :A paladin who works in Goodereste's castle. He is only awake at night and falls asleep when its daytime. ;Ker, Ber, and Ros :Hades' subordinates. They are a trio of wolf demons. ;Tire Genie :A demon whose body is made of tires. Should his body be missing, he appears in gaseous form. ;Ice Golem :A demon made of ice cubes. He is the leader of the ice demons. ;Neo Alraune's older brother. :Neo's unnamed older brother who is a demon that resembles a tree stump. Even when his body is cut up, he does not die so easily.


Media


Manga

Written and illustrated by Kagiji Kumanomata, ''Sleepy Princess in the Demon Castle'' started in
Shogakukan is a Japanese publisher of comics, magazines, light novels, dictionaries, literature, non-fiction, home media, and other media in Japan. Shogakukan founded Shueisha, which also founded Hakusensha. These are three separate companies, but ...
's manga magazine ''
Weekly Shōnen Sunday is a weekly manga magazine published in Japan by Shogakukan since March 1959. Contrary to its title, ''Weekly Shōnen Sunday'' issues are released on Wednesdays. ''Weekly Shōnen Sunday'' has sold over 1.8billion copies since 1986, making it ...
'' on May 11, 2016. Shogakukan has collected its chapters into individual volumes. The first volume was released on September 16, 2016. As of February 18, 2025, twenty-nine volumes have been released.
Viz Media Viz Media, LLC is an American entertainment company headquartered in San Francisco, California, focused on publishing manga, and distribution and licensing Japanese anime, films, and television series. The company was founded in 1986 as Viz, ...
announced in September 2017 that they had licensed the series in North America. The first volume was released on June 12, 2018. On May 9, 2023, Viz Media launched their ''Viz Manga'' digital manga service, with the series' chapters receiving simultaneous English publication in North America as they are released in Japan. An official fanbook of the series was released on October 16, 2020.


Volumes


Anime

An
anime is a Traditional animation, hand-drawn and computer animation, computer-generated animation originating from Japan. Outside Japan and in English, ''anime'' refers specifically to animation produced in Japan. However, , in Japan and in Ja ...
television series adaptation was announced in ''Weekly Shōnen Sunday'' in September 2019. The series was animated by
Doga Kobo is a Japanese animation studio formed by former Toei Animation members Hideo Furusawa and Megumu Ishiguro, located in Nerima, Tokyo, Japan. The studio was established on July 11, 1973, and is a subsidiary of Kadokawa Corporation. Although the st ...
and directed by Mitsue Yamazaki, with Yoshiko Nakamura handling series composition and Ai Kikuchi designing the characters.
Yukari Hashimoto is a Japanese composer and arranger. She has composed the music for a number of anime series, including ''Toradora!'', ''Omamori Himari'', ''Mayo Chiki!'', ''Sayonara, Zetsubou-Sensei'', ''Kanamemo'', ''MM!'', ''Penguindrum'', ''Yurikuma Arashi'', ...
composed the series' music. The series ran for 12 episodes from October 6 to December 22, 2020, on
TV Tokyo JOTX-DTV (channel 7), branded as is a Japanese television station that serves as the flagship of the TX Network.AT-X, and BS TV Tokyo.
Inori Minase is a Japanese voice actress and singer affiliated with Axl One. In March 2016, she won the Best Lead Actress Award in the 10th Seiyu Awards for her leading roles as Jun Naruse in the box office hit '' The Anthem of the Heart'' and as Yuki Ta ...
performed the opening theme , while ORESAMA performed the ending theme "Gimmme!".
Funimation Funimation was an American Video on demand#Subscription models, subscription video on-demand Over-the-top media service, over-the-top Streaming media, streaming service. Launched in 2016, the service was one of the leading distributors of anime ...
acquired the series and streamed it on its website in North America and the British Isles. On February 21, 2021, Funimation announced the series would receive an English dub, with the first episode premiering the next day. Following
Sony is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (i ...
's acquisition of
Crunchyroll Crunchyroll is an American Video on demand#Subscription models, subscription video on-demand Over-the-top media service, over-the-top Streaming media, streaming service owned by Sony, Sony Group Corporation. The service primarily distributes fi ...
, the series was moved to Crunchyroll. In Southeast Asia and South Asia, the anime is licensed by Muse Communication, and released on
Bilibili Bilibili (stylized in all lowercase), nicknamed B Site, is a Chinese online video sharing website based in Shanghai where users can submit, view, and add overlaid commentary on videos. Bilibili hosts videos on various themes, including ...
in Southeast Asia. The series premiered on
Animax Asia Animax is an Asian pay television channel owned by KC Global Media Asia. The channel was originally owned by Sony Pictures Entertainment, and took its name from the Japanese satellite TV network; which was then-majority owned by subsidiary Sony ...
on May 12, 2021.


Episodes


Reception

In 2017, the series was ranked 16th at the third
Next Manga Award The is an annual award for manga series presented by Kadokawa Corporation's '' Da Vinci'' magazine and Niconico streaming website. It is divided into two categories: one for print manga, and one for web manga. Overview The award was originally ...
s in the print category.
Anime News Network Anime News Network (ANN) is a news website that reports on the status of anime, manga, video games, Japanese popular music and other related cultures within North America, Australia, Southeast Asia and Japan. The website offers reviews and ot ...
's staff included ''Sleepy Princess in the Demon Castle'' on their top 5 best anime list of 2020: Rebecca Silverman placed it at number four, praising the way the source manga gets cherry-picked and comes together as a whole, concluding that: "It's not only funny, but also one of the best adaptations I've seen, and I can't wait to start rewatching it as soon as it ends." Caitlin Moore placed it at number five, praising Mitsue Yamazaki and Yoshiko Nakamura for adapting the "already funny source material, tweaking the jokes, and incorporating split-second comic timing to make it outright hilarious."


Notes


References


External links

* * * * {{Doga Kobo Adventure anime and manga Anime series based on manga Comedy anime and manga Comics set in castles Crunchyroll anime Demons in anime and manga Doga Kobo Fantasy anime and manga Funimation Muse Communication Shogakukan manga Shōnen manga Slice of life anime and manga Television series set in castles TV Tokyo original programming Viz Media manga