Pre-orders Now Open: New Book from Popular YouTuber 'Water Challenge,' with Over 3.97 Million Followers, Launches on July 22! 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class' Teaches the Fun of Science
Key facts
- Pre-orders Now Open: New Book from Popular YouTuber 'Water Challenge,' with Over 3.97 Million Followers, Launches on July 22! 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class' Teaches the Fun of Science
- The third book from 'Water Challenge,' a hugely popular YouTube channel with over 3.97 million followers, titled 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class,' launches on July 22, 2026. This engaging science book blends fun experiments and facts, available with exclusive bonuses at bookstores nationwide and on Amazon.
- Source: PR Times
- Date: June 15, 2026
Direct answer
The third book from 'Water Challenge,' a hugely popular YouTube channel with over 3.97 million followers, titled 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class,' launches on July 22, 2026. This engaging science book blends fun experiments and facts, available with exclusive bonuses at bookstores nationwide and on Amazon.
- Citation
- Pre-orders Now Open: New Book from Popular YouTuber 'Water Challenge,' with Over 3.97 Million Followers, Launches on July 22! 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class' Teaches the Fun of Science (June 15, 2026), PR Times
- Source
- PR Times
- Date
- June 15, 2026
The third book from 'Water Challenge,' a hugely popular YouTube channel with over 3.97 million followers, titled 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class,' launches on July 22, 2026. This engaging science book blends fun experiments and facts, available with exclusive bonuses at bookstores nationwide and on Amazon.
📋 Article Processing Timeline
- 📰 Published: June 15, 2026 at 19:00
- 🔍 Collected: June 16, 2026 at 02:01 (7h 1m after Published)
- 🤖 AI Analyzed: June 16, 2026 at 02:07 (5 min after Collected)
● Experience the Wonders of Science with Mr. Sumanai!
With over 3.97 million total followers, the children's and family-favorite YouTube channel 'Water Challenge' releases its third book! In this edition, Mr. Sumanai and the members of Sumana School take on entertaining science topics through hands-on experiments.
"Is 'panic strength' during emergencies real?"
"Can bats 'see' using sound?"
"Does water stay in a bucket when spun in circles?"
Explore these fun and mysterious questions and learn scientific concepts in an enjoyable way.
Dive into the world of science while enjoying the lively interactions between Mr. Sumanai and his team!
● Exclusive Bonus Gifts at Bookstores Nationwide & Amazon!
Customers who purchase the book at participating bookstores nationwide will receive a limited-edition postcard as a bonus gift!
※ List of participating stores will be announced later.
Additionally, those who buy from Kinokuniya Bookstores, Miraiya Bookstore, or Amazon nationwide will receive an exclusive clear card!
● Who Are 'Mr. Sumanai' and 'Water Challenge'?
'Mr. Sumanai,' featured in this book, is the flagship character of the YouTube channel 'Water Challenge,' known for its creative content centered around the popular game 'Minecraft.' Famous for his catchphrase "Sumanaaaiii!" his adventures and comedic skits with the quirky members of 'Sumana School' have made him a favorite among children.
● The 'Mr. Sumanai' Series by Seitosha Publishing
■ Title: So Funny It's Unforgivable! Mr. Sumanai's Riddle Book
■ Author: Water Challenge
■ Publisher: Seitosha Co., Ltd.
■ Price: ¥1,320 (¥1,200 + tax)
■ Format / Pages: B6 / 160 pages
■ ISBN: 9784791634354
■ Title: So Dangerous It's Unforgivable! Mr. Sumanai's Survival Class with Dangerous Creatures
■ Author: Water Challenge
■ Supervised by: Kiko Ohbuchi
■ Publisher: Seitosha Co., Ltd.
■ Price: ¥1,518 (¥1,380 + tax)
■ Format / Pages: A5 / 160 pages
■ ISBN: 9784791634989
【Book Overview】
■ Title: So Amazing It's Unforgivable! Mr. Sumanai's Science Class
■ Author: Water Challenge
■ Supervised by: Yasufumi Kawamura, Naomi Kobayashi
■ Publisher: Seitosha Co., Ltd.
■ Release Date: Wednesday, July 22, 2026
■ Price: ¥1,320 (¥1,200 + tax)
■ Format / Pages: B6 / 160 pages
■ ISBN: 9784791635344
【Sales Pages】
■ Amazon (Standard Edition): https://www.amazon.co.jp/dp/4791635345
■ Amazon (Bonus Edition): https://www.amazon.co.jp/dp/4791635736
■ Rakuten Books: https://books.rakuten.co.jp/rb/18674124
【Company Overview】
Company Name: Seitosha Co., Ltd.
Representative: Kazunori Wakamatsu, President & CEO
Address: 2-3-13 Yushima, Bunkyo-ku, Tokyo 113-0034
Business: Production and sales of books and digital publications
URL: https://www.seitosha.co.jp/
■ Media Inquiries
Company: Seitosha Co., Ltd.
Contact: Kobayashi
TEL: 03-5800-3120
Email: media@seitosha.co.jp
With over 3.97 million total followers, the children's and family-favorite YouTube channel 'Water Challenge' releases its third book! In this edition, Mr. Sumanai and the members of Sumana School take on entertaining science topics through hands-on experiments.
"Is 'panic strength' during emergencies real?"
"Can bats 'see' using sound?"
"Does water stay in a bucket when spun in circles?"
Explore these fun and mysterious questions and learn scientific concepts in an enjoyable way.
Dive into the world of science while enjoying the lively interactions between Mr. Sumanai and his team!
● Exclusive Bonus Gifts at Bookstores Nationwide & Amazon!
Customers who purchase the book at participating bookstores nationwide will receive a limited-edition postcard as a bonus gift!
※ List of participating stores will be announced later.
Additionally, those who buy from Kinokuniya Bookstores, Miraiya Bookstore, or Amazon nationwide will receive an exclusive clear card!
● Who Are 'Mr. Sumanai' and 'Water Challenge'?
'Mr. Sumanai,' featured in this book, is the flagship character of the YouTube channel 'Water Challenge,' known for its creative content centered around the popular game 'Minecraft.' Famous for his catchphrase "Sumanaaaiii!" his adventures and comedic skits with the quirky members of 'Sumana School' have made him a favorite among children.
● The 'Mr. Sumanai' Series by Seitosha Publishing
■ Title: So Funny It's Unforgivable! Mr. Sumanai's Riddle Book
■ Author: Water Challenge
■ Publisher: Seitosha Co., Ltd.
■ Price: ¥1,320 (¥1,200 + tax)
■ Format / Pages: B6 / 160 pages
■ ISBN: 9784791634354
■ Title: So Dangerous It's Unforgivable! Mr. Sumanai's Survival Class with Dangerous Creatures
■ Author: Water Challenge
■ Supervised by: Kiko Ohbuchi
■ Publisher: Seitosha Co., Ltd.
■ Price: ¥1,518 (¥1,380 + tax)
■ Format / Pages: A5 / 160 pages
■ ISBN: 9784791634989
【Book Overview】
■ Title: So Amazing It's Unforgivable! Mr. Sumanai's Science Class
■ Author: Water Challenge
■ Supervised by: Yasufumi Kawamura, Naomi Kobayashi
■ Publisher: Seitosha Co., Ltd.
■ Release Date: Wednesday, July 22, 2026
■ Price: ¥1,320 (¥1,200 + tax)
■ Format / Pages: B6 / 160 pages
■ ISBN: 9784791635344
【Sales Pages】
■ Amazon (Standard Edition): https://www.amazon.co.jp/dp/4791635345
■ Amazon (Bonus Edition): https://www.amazon.co.jp/dp/4791635736
■ Rakuten Books: https://books.rakuten.co.jp/rb/18674124
【Company Overview】
Company Name: Seitosha Co., Ltd.
Representative: Kazunori Wakamatsu, President & CEO
Address: 2-3-13 Yushima, Bunkyo-ku, Tokyo 113-0034
Business: Production and sales of books and digital publications
URL: https://www.seitosha.co.jp/
■ Media Inquiries
Company: Seitosha Co., Ltd.
Contact: Kobayashi
TEL: 03-5800-3120
Email: media@seitosha.co.jp
FAQ
When is 'So Amazing It's Unforgivable! Mr. Sumanai's Science Class' released?
It will be released on July 22, 2026. Pre-orders are now open.
What age group is this book for?
Recommended for elementary to middle school students, but enjoyable for adults too.
How long are the bonuses available?
While supplies last. Early purchase is recommended.
Where can I buy the book?
Available at bookstores nationwide, Amazon, and Rakuten Books.
Who supervised the scientific content?
Yasufumi Kawamura and Naomi Kobayashi supervised the scientific accuracy.