With over 3.97 million total followers! The members of Sumanaisensei & Sumanaischool from the highly popular YouTube channel "Water Challenge," loved by children, take on a dangerous creature capture mission! This book is a fun way to learn about the ecology of dangerous creatures through manga and an illustrated guide.

● Learn about the ecology of dangerous creatures while having fun with Sumanaisensei and his team!

In this book, the members of Sumanaischool take on a mission to capture dangerous creatures that have wandered into Sumanaisensei's world. Over 100 different dangerous creatures appear, from powerful terrestrial creatures like lions and tigers, to venomous creatures like king cobras and giant toads, as well as marine and freshwater creatures like sharks and electric eels.

With exciting stories and a photo-illustrated guide, this content is full of engaging material. You can learn about the ecology of dangerous creatures while enjoying the interactions between Sumanaisensei and the Sumanaischool members.

● Exclusive bonuses available only at bookstores nationwide & Rakuten Books!

Those who purchase this new work, "Too Dangerous to Be Sorry! Sumanaisensei's Dangerous Creature Survival Classroom," at Miraiya Shoten stores nationwide, Kinokuniya bookstores (at participating stores only), or Rakuten Books will receive an exclusive bonus sticker seal!

Miraiya Shoten Bonus

Kinokuniya Bookstore Group Bonus

Rakuten Books Bonus

Furthermore, a campaign will be held where those who purchase Seitosha's Sumanaisensei series, including the previously published "Too Interesting to Be Sorry! Sumanaisensei's Riddle Book," at participating bookstores nationwide will receive an exclusive postcard as a gift.

*Participating stores will be announced at a later date.

Exclusive Postcard Bonus

● What are "Sumanaisensei" and "Water Challenge"?

"Sumanaisensei," who appears in this book, is the main character of the YouTube channel "Water Challenge," which delivers various content centered around the popular game "Minecraft." With the catchphrase "Sumanaiiiiii!", their adventures and comedic developments with the unique members of "Sumanaischool" are hugely popular with children.

● Seitosha's "Sumanaisensei" Series

Title: Too Interesting to Be Sorry! Sumanaisensei's Riddle Book

Author: Water Challenge

Publisher: Seitosha Co., Ltd.

Price: 1,320 yen (1,200 yen + tax)

Format/Pages: B6 size / 160 pages

ISBN: 9784791634354

【Book Overview】

Title: Too Dangerous to Be Sorry! Sumanaisensei's Dangerous Creature Survival Classroom

Author: Water Challenge

Supervision: Kigou Ohuchi

Publisher: Seitosha Co., Ltd.

Release Date: Friday, May 29, 2026

Price: List Price 1,518 yen (1,380 yen + tax)

Format/Pages: A5 size / 160 pages

ISBN: 9784791634989

【Sales Pages】

Amazon

https://www.amazon.co.jp/dp/4791634985

Rakuten Books:

Bonus Edition: https://books.rakuten.co.jp/rb/18592317/

Standard Edition: https://books.rakuten.co.jp/rb/18592316/

【Company Profile】

Company Name: Seitosha Co., Ltd.

Representative: Kazuki Wakamatsu, Representative Director

Location: 2-3-13 Yushima, Bunkyo-ku, Tokyo 113-0034

Business Activities: Production and sale of books, e-books, etc.

URL: https://www.seitosha.co.jp/

Inquiries regarding this matter

Company Name: Seitosha Co., Ltd.

Contact Person: Kobayashi

TEL: 03-5800-3120

Email: media@seitosha.co.jp

FACT BOX

  • Source: PR TIMES
  • Category: product_launch