● 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: [email protected]
FACT BOX
- Source: PR TIMES
- Category: New Product