Mondaiji-tachi ga isekai kara kuru soudesu yo

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Note: Volumes 1 to 5 were removed due to a DMCA request

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This project has not been updated in the past 6 months.

Help revive this project by joining the translation team! — Learn more about Baka-Tsuki activity status.

Volume 1 Cover

Mondaiji-tachi ga Isekai Kara Kuru Sou Desu yo? (問題児たちが異世界から来るそうですよ? lit. Problem Children are Coming from Another World, Aren't They?) also known as Mondaiji (問題児) for short is a Japanese light novel series written by Tatsunoko Tarou and illustrated by Amano Yuu. An anime adaptation by Diomedea aired from January 11, 2013 to March 15, 2013, covering the first two volumes of the novel.

  • Due to the author's health problems and disagreements with the publisher, the series is currently on indefinite hiatus at Last Embryo V8.

The Mondaiji-tachi ga Isekai Kara Kuru Sou Desu yo? series is also available in the following languages:

Story Synopsis

Sakamaki Izayoi, Kudou Asuka, and Kasukabe Yō have tremendous powers and are bored with the regular world. An envelope arrives for each person, and when each opens their envelope, they are stunned to see the scenery around them change to a world they had never encountered before. They've been summoned by Kuro Usagi to help the community "No Name" to overthrow the Demon lords.



Those who wish to contribute are asked to first notify a supervisor beforehand.

Translators are asked to register which chapters they're working on (see the Guideline page for usage rules).

Format Standards

Feedback / Discussions

The blogs also serve the purpose of easier communication with the particular translator. In case of Magref's blog you can view the translation a bit earlier then here.


  • December 25, 2019
    • Last Embryo V3 Completed
  • October 22, 2017
    • Last Embryo V2 completed
  • July 20, 2017
    • Last Embryo V1 completed


A timeline to better understand when the stories from the second half of Volume 8 and Volume 9 take place.

Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo? series by Tatsunoko Tarō

Volume 6 - Flag of the Ouroboros Alliance (Full Text)

Mondaiji-tachi ga isekai kara kuru soudesu yo v06 000a.jpg

Volume 7 - Setting Sun and Falling Moon (Full Text)

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Volume 8 - Tyranny of the Three Headed Dragon (Full Text)

Mondaiji-tachi ga isekai kara kuru soudesu yo v8 Cover.jpg

Volume 9 - Yes! Everyday life in Little Garden (Full Text)

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Volume 10 - Then, Rabbit Heads Towards Purgatory (Full Text)

Mondaiji-tachi ga isekai kara kuru soudesu yo V10 Cover.jpg

Volume 11 - Strike Faster Than Starlight!

Mondaiji-tachi ga isekai kara kuru soudesu yo Cover 11.jpg

Volume 12 - It's a War God's Career Consultation!

Mondaiji-tachi ga isekai kara kuru soudesu yo Cover 12.jpg

Last Embryo series by Tatsunoko Tarō (continuation of the Mondaiji series)

Volume 1 - Return of the problem child!

Last Embryo Cover 1.jpg

Volume 2 - The Second Coming of Avatāra

Last Embryo Cover 2.jpg

Volume 3 - Berserk, Spirit Train!

Last Embryo Cover 3.jpg

Volume 4 - Return of the King

Last Embryo Cover 4.jpg

Volume 5 - Time of Gathering, Rampage Resumes!

Last Embryo Cover 5.jpg

The Mondaiji-tachi Short Stories by Tatsunoko Tarou

The Story Between the Vampire Maid and the Storyteller (Full Text)

Shiroyasha's Farewell Party (Full Text)


Project Staff

  • Supervisor:
  • Project Manager: Frozen
  • Project Manager: (Original, Inactive)Firebird








  • Yuuki
  • StarlightAT

Series Overview

Mondaiji-tachi ga isekai kara kuru soudesu yo

  • Volume 1: 問題児たちが異世界から来るそうですよ? YES! ウサギが呼びました! (March 31, 2011, ISBN 978-4-04-474839-5 )
  • Volume 2: 問題児たちが異世界から来るそうですよ? あら、魔王襲来のお知らせ? (June 30, 2011, ISBN 978-4-04-474848-7 )
  • Volume 3: 問題児たちが異世界から来るそうですよ? そう……巨龍召喚 (October 29, 2011, ISBN 978-4-04-474854-8 )
  • Volume 4: 問題児たちが異世界から来るそうですよ? 十三番目の太陽を撃て (February 29, 2012, ISBN 978-4-04-100182-0 )
  • Volume 5: 問題児たちが異世界から来るそうですよ? 降臨、蒼海の覇者 (June 30, 2012, ISBN 978-4-04-100357-2 )
  • Volume 6: 問題児たちが異世界から来るそうですよ? ウロボロスの連盟旗 (November 30, 2012, ISBN 978-4-04-100585-9 )
  • Volume 7: 問題児たちが異世界から来るそうですよ? 落陽、そして墜月 (March 30, 2013, ISBN 978-4-04-100759-4 )
  • Volume 8: 問題児たちが異世界から来るそうですよ? 暴虐の三頭龍 (August 01, 2013, ISBN 978-4-04-100936-9 )
  • Volume 9: 問題児たちが異世界から来るそうですよ? YES! 箱庭の日常ですっ! (November 01, 2013, ISBN 978-4-04-101060-0 )
  • Volume 10: 問題児たちが異世界から来るそうですよ? そして、兎は煉獄へ (April 01, 2014, ISBN 978-4-04-101295-6 )
  • Volume 11: 問題児たちが異世界から来るそうですよ? 撃て、星の光より速く! (August 01, 2014, ISBN 978-4-04-102006-7 )
  • Volume 12: 問題児たちが異世界から来るそうですよ? 軍神の進路相談です! (April 01, 2015, ISBN 978-4-04-102007-4)

Last Embryo

  • Volume 1: ラストエンブリオ 1 問題児の帰還 (June 01, 2015, ISBN 978-4-04-103061-5-C0193)
  • Volume 2: ラストエンブリオ 2 再臨のアヴァターラ (December 01, 2015, ISBN 978-4-04-103093-6-C0193)
  • Volume 3: ラストエンブリオ 3 暴走、精霊列車! (June 01, 2016, ISBN 978-4-04-103955-7-C0193)
  • Volume 4: ラストエンブリオ 4 王の帰還 (April 01, 2017, ISBN 978-4-04-104715-6-C0193)
  • Volume 5: ラストエンブリオ 5 集結の時、暴走再開! (June 01, 2018, ISBN 978-4-04-105519-9-C0193)
  • Volume 6: ラストエンブリオ 6 激闘!! アトランティス大陸 (December 01, 2018, ISBN 978-4-04-107678-1-C0193)
  • Volume 7: ラストエンブリオ 7 吼えよ英傑、甦れ神の雷霆! (June 01, 2019, ISBN 978-4-04-107679-8-C0193)
  • Volume 8: ラストエンブリオ 8 追想の問題児 (July 07, 2020, ISBN 978-4-04-108727-5-C0193)