|Anime television series|
|Directed by||Minoru Ashina|
|Written by||Minoru Ashina|
|Music by||Ruka Kawada|
|Original network||Tokyo MX, MBS, BS11, AT-X, TVA|
|Original run||April 9, 2019 – present|
Isekai Quartet (Japanese: 異世界かるてっと, Hepburn: Isekai Karutetto) is a Japanese anime series that serves as a chibi-style crossover between the light novel series KonoSuba, Overlord, Re:Zero − Starting Life in Another World, and The Saga of Tanya the Evil, all published by Kadokawa Corporation. The series aired its first season from April to June 2019. A second season aired from January to March 2020, including additional characters from The Rising of the Shield Hero and Cautious Hero: The Hero Is Overpowered but Overly Cautious. A third season has been announced.
One day, a magic button suddenly appears. The protagonists from KonoSuba, Overlord, Re:Zero − Starting Life in Another World, and The Saga of Tanya the Evil all press the button occasionally, unintentionally and move to a parallel world — another brand new isekai — where a new story featuring high school life begins. Soon, they are joined by protagonists from The Rising of the Shield Hero and Cautious Hero: The Hero Is Overpowered but Overly Cautious.
|KonoSuba||Kazuma Satou||Jun Fukushima||Arnie Pantoja|
|Aqua||Sora Amamiya||Faye Mata|
|Megumin||Rie Takahashi||Erica Mendez|
|Darkness||Ai Kayano||Cristina Vee|
|Chris||Ayaka Suwa||Kira Buckland|
|Vanir||Masakazu Nishida||Anthony Bowling|
|Yunyun||Aki Toyosaki||Kayli Mills|
|Chomusuke||Hitomi Nabatame||Ryan Bartley|
|Wiz||Yui Horie||Brianna Knickerbocker|
|Ruffian||Tetsu Inada||Jeremy Inman|
|Overlord||Ainz Ooal Gown||Satoshi Hino||Chris Guerrero|
|Albedo||Yumi Hara||Elizabeth Maxwell|
|Shalltear Bloodfallen||Sumire Uesaka||Felecia Angelle|
|Aura Bella Fiora||Emiri Katō||Jill Harris|
|Mare Bello Fiore||Yumi Uchiyama||Megan Shipman|
|Demiurge||Masayuki Katō||Jeff Johnson|
|Cocytus||Kenta Miyake||Bryan Massey|
|Hamsuke||Akeno Watanabe||Heather Walker|
|Yuri Alpha||Hiromi Igarashi||Whitney Rodgers|
|Lupusregina Beta||Mikako Komatsu||Alexis Tipton|
|Narberal Gamma||Manami Numakura||Anastasia Muñoz|
|CZ2128 Delta||Asami Seto||Michelle Rojas|
|Solution Epsilon||Ayane Sakura||Mallorie Rodak|
|Entoma Vasilissa Zeta||Kei Shindō||Tia Ballard|
|Pandora's Actor||Mamoru Miyano||Eric Vale|
|Sebas Tian||Shigeru Chiba||Bill Jenkins|
|Kyouhukou||Hiroshi Kamiya||John Swasey|
|Re:Zero − Starting Life in Another World||Subaru Natsuki||Yūsuke Kobayashi||Sean Chiplock|
|Emilia||Rie Takahashi||Kayli Mills|
|Puck||Yumi Uchiyama||Erica Mendez|
|Rem||Inori Minase||Brianna Knickerbocker|
|Ram||Rie Murakawa||Ryan Bartley|
|Beatrice||Satomi Arai||Kira Buckland|
|Roswaal L. Mathers||Takehito Koyasu||Ray Chase|
|Felt||Chinatsu Akasaki||Christine Marie Cabanos|
|Reinhard van Astrea||Yuichi Nakamura||Robbie Daymond|
|Julius Euclius||Takuya Eguchi||Chris Niosi|
|Wilhelm van Astrea||Kenyu Horiuchi||Barry Yandell|
|Petelgeuse Romanee-Conti||Yoshitsugu Matsuoka||Todd Haberkorn|
|The Saga of Tanya the Evil||Tanya von Degurechaff||Aoi Yūki||Monica Rial|
|Viktoriya Ivanovna Serebryakov (Visha)||Saori Hayami||Jeannie Tirado|
|Matheus Johann Weiss||Daiki Hamano||Daman Mills|
|Vooren Grantz||Yūsuke Kobayashi||Jeff Johnson|
|Wilibald Koenig||Jun Kasama||Chris Wehkamp|
|Rhiner Neumann||Daichi Hayashi||Ben Phillips|
|Erich von Rerugen||Shinichiro Miki||J. Michael Tatum|
|Kurt von Rudersdorf||Tesshō Genda||Greg Dulcie|
|Hans von Zettour||Hōchū Ōtsuka||Mark Stoddard|
|Adelheid von Schugel||Nobuo Tobita||Charlie Campbell|
|The Rising of the Shield Hero||Naofumi Iwatani||Kaito Ishikawa||Billy Kametz|
|Raphtalia||Asami Seto||Erica Mendez|
|Filo||Rina Hidaka||Brianna Knickerbocker|
|Cautious Hero: The Hero Is Overpowered but Overly Cautious||Seiya Ryuguin||Yūichirō Umehara||Anthony Bowling|
|Ristarte||Aki Toyosaki||Jamie Marchi|
Production and release
The series is written and directed by Minoru Ashina, with character designs by Minoru Takehara, who also serves as chief animation director. The series is animated by Studio Puyukai. It aired from April 9 to June 25, 2019. The series ran 12 episodes. Funimation has licensed the series and is streaming it in both Japanese and English. On April 23, 2019, it was added to Crunchyroll's streaming library as well. Satoshi Hino, Jun Fukushima, Yūsuke Kobayashi and Aoi Yūki perform the opening theme song "Isekai Quartet" (異世界かるてっと, Isekai Karutetto), while Yumi Hara, Sora Amamiya, Rie Takahashi and Aoi Yūki perform the ending theme song "Isekai Girls Talk" (異世界ガールズ♡トーク, Isekai gāruzu tōku).
A second season of the anime series was announced at the ending of Episode 12 and premiered on January 14, 2020. The main staff members returned to reprise their roles. The season includes guest appearances of characters from The Rising of the Shield Hero. Hino, Fukushima, Kobayashi and Yūki perform the second season's opening theme song "Isekai Showtime" (異世界ショータイム, Isekai Shōtaimu), while Sumire Uesaka, Rie Takahashi, Inori Minase, and Saori Hayami perform the second season's ending theme song, "Ponkotsu! Isekai Theater" (ポンコツ!異世界シアター, Ponkotsu! Isekai Shiatā). The second season ran for 12 episodes. Funimation has licensed the series for a simuldub. Crunchyroll is also streaming the second season. Muse Communication is streaming the second season in Southeast Asia.
A third season of the anime series was announced at the ending of the second season's final episode.
- A fan nickname for Re: Zero's Emilia who shares the same voice actress with Konosuba's Megumin.
- "The Spring 2019 Anime Preview Guide Isekai Quartet". Anime News Network. April 9 – June 25, 2019. Retrieved April 18, 2019.
- Hodgkins, Crystalyn (October 6, 2018). "New Isekai Quartet Anime Project Crosses Over Overlord, Re:Zero, Tanya, Konosuba Franchises". Anime News Network. Retrieved October 6, 2018.
- 「異世界かるてっと」27キャラが学園に集合！リレーPV「幼女戦記」版も公開. コミックナタリー (in Japanese). ナターシャ. Retrieved March 8, 2019.
- "STAFF&CAST". TVアニメ「異世界かるてっと」オフィシャルサイト (in Japanese). Retrieved March 8, 2019.
- "[Master Thread] ISEKAI QUARTET (Dubbed)". Funimation. Retrieved May 1, 2019.
- 異世界かるてっと - アニメ声優情報. www.mau2.com. Retrieved 2019-06-15.
- Hodgkins, Crystalyn (March 8, 2019). "Isekai Quartet TV Anime Premieres on April 9". Anime News Network. Retrieved March 8, 2019.
- Hodgkins, Crystalyn (March 22, 2019). "Isekai Quartet Anime's Promo Video, 2 Ads Streamed". Anime News Network. Retrieved March 22, 2019.
- "Funimation to Stream Isekai Quartet, New Strike Witches, Helpful Fox Senko-san, Wise Man's Grandchild Anime". Anime News Network. April 8, 2019. Retrieved April 9, 2019.
- "Crunchyroll Introduces ISEKAI QUARTET Anime to Spring 2019 Lineup". Crunchyroll. April 23, 2019. Retrieved April 23, 2019.
- "Products". isekai-quartet.com. Retrieved April 10, 2019.
- Sherman, Jennifer (June 25, 2019). "Isekai Quartet Crossover Anime Gets 2nd Season". Anime News Network. Retrieved June 25, 2019.
- Hodgkins, Crystalyn (October 7, 2019). "Isekai Quartet 2 Anime's Promo Video Reveals January Premiere". Anime News Network. Retrieved October 7, 2019.
- Loo, Egan (October 5, 2019). "The Rising of the Shield Hero Characters to Guest-Star in Isekai Quartet Anime Season 2". Anime News Network. Retrieved October 6, 2019.
- Sherman, Jennifer (December 6, 2019). "Isekai Quartet 2 Anime's Promo Video Reveals January Premiere". Anime News Network. Retrieved December 6, 2019.
- Loo, Egan (December 24, 2019). "Isekai Quartet 2 Anime Unveils 2nd Promo Video, 12-Episode Length". Anime News Network. Retrieved December 24, 2019.
- "Stay Cozy with Funimation's Winter 2020 Lineup". Funimation. December 26, 2019. Retrieved January 2, 2020.
- "Funimation Adds Toilet-bound Hanako-kun, Isekai Quartet 2, 'If My Favorite Pop Idol Made It to the Budokan, I Would Die' Anime to Winter Lineup". Anime News Network. December 23, 2019. Retrieved January 2, 2020.
- "Crunchyroll Adds Isekai Quartet 2 Anime to Winter Lineup". Anime News Network. December 23, 2019. Retrieved January 2, 2020.
- "Muse Asia Streams A3!, Asteroid in Love, Isekai Quartet 2, BOFURI". Anime News Network. December 27, 2019. Retrieved January 11, 2020.
- Frye, Patrick (March 31, 2020). "Isekai Quartet Season 3 release date: Will Isekai Quartet 3 include Cautious Hero's Seiya and Ristarte, BOFURI's Maple and Sally, Plunderer's Licht and Hina, or So I'm A Spider, So What?". Monsters and Critics. Retrieved March 31, 2020.
- Loveridge, Lynzee; Morrissy, Kim (December 4, 2019). "Demon Slayer, Dr. Stone, Zombie Land Saga Buzzwords Make Gadget Tsūshin 2019 List". Anime News Network. Retrieved December 14, 2019.