The Popular "Red Sheet" from Memorization Study Turns Into a Maze, Puzzle, and Escape Game!? A New Brain-Training Game Book, Supervised by a Neuroscientist, Launches from the Hit Elementary School Series "Drum-Drill"!

Gakken Inc. (Shinagawa-ku, Tokyo / President and CEO: Tatsuya Minami), a group company of Gakken Holdings Co., Ltd. (Shinagawa-ku, Tokyo / President and CEO: Hiroaki Miyahara), released "Drum-Drill GAMES: Dragon Game Book - Super Brain King: The Challenge from the Flame Emperor Dragon" on June 26, 2026.

Have fun with cool dragons and naturally develop "thinking skills"! This new game book comes from the popular "Drum-Drill" series, which has sold over 1 million copies in total.

A Whole New Puzzle-Solving Experience Using the "Dragon Eye," a Magical Tool Based on the "Red Sheet" Concept

The highlight of this book is a unique gaming experience using the included "Dragon Eye"—a special tool that reveals or hides hidden text and hints when placed over pages. The "Dragon Eye" leverages the properties of the "red sheet" (a red transparent filter commonly used in memorization learning), creating an original game element. It stimulates children's curiosity and dramatically enhances the fun of solving puzzles.

▲ Hidden clues appear on the page when viewed through the "Dragon Eye"!

Supervised by Neuroscientist Dr. Kikuki Shinohara—Build Thinking Skills Through Play

This book is supervised by renowned neuroscientist Dr. Kikuki Shinohara, widely known from appearances on programs such as "Chiko-chan ni Okorerareru!" and "Children's Science Telephone Consultation." By engaging in diverse games like riddle-solving, puzzles, and mazes, children can naturally strengthen their "working memory" and "logical thinking skills." Dr. Shinohara comments: "Every game in this book helps build the foundation of thinking ability. (...) This book makes using your brain something you truly enjoy."

▲ For example, mazes with conditions such as "pass through all the dragons" train working memory.

Over 50 Diverse Types of Games

Packed with more than 50 different games, including riddles, mazes, puzzles, spot-the-difference, ciphers, and optical illusions, this book offers a rich variety of challenges. Its engaging content makes it perfect for long trips or on-the-go entertainment.

▲ A wide range of games packed into one book.

An Immersive Full-Scale Adventure Story

The book features a compelling adventure story in which the protagonist, Rihito, sets out on a journey to find a legendary dragon and faces an ultimate battle of wits against the "Flame Emperor Dragon," said to dwell in the Valley of Flames. Fans of the "Drum-Drill" series will also enjoy appearances by many of the cool dragons they already love.

▲ Enjoy not only the games but also the exciting story.

[Product Details]

"Drum-Drill GAMES: Dragon Game Book - Super Brain King: The Challenge from the Flame Emperor Dragon"

Supervised by: Kikuki Shinohara

Authored by: Tokio Domon

Illustrated by: Inosuke, Sanosuke Sakuma, Shosuke

Price: 1,650 yen (tax included)

Release Date: June 26, 2026

Format: A5 / 144 pages

ISBN: 978-4-05-206278-0

Publisher: Gakken Inc.

Gakken Publishing Website: https://hon.gakken.jp/book/1020627800

[Where to Buy]

・Amazon: https://www.amazon.co.jp/dp/4052062787

・Rakuten Books: https://books.rakuten.co.jp/rb/18556572/

・Seven Net: https://7net.omni7.jp/detail/1107704402

Gakken Inc.

https://www.corp-gakken.co.jp/ ・President and CEO: Tatsuya Minami ・Company Established: January 13, 2009 (Company name changed on October 1, 2022) ・Capital: 50 million yen ・Address: 2-11-8 Nishi-Gotanda, Shinagawa-ku, Tokyo 141-8416 ・Business Activities: Publishing and content, global operations, medical and nursing care publishing content, preschool and school supplies, classroom-related services, e-commerce and online services, advertising

GAKKEN HOLDINGS CO., LTD.

https://www.gakken.co.jp/ ・President and CEO: Hiroaki Miyahara ・Company Established: March 31, 1947 ・Capital: 19,817 million yen ・Sales Revenue: 199.1 billion yen, 82 consolidated subsidiaries (as of September 2025) Listed on the Tokyo Stock Exchange Prime Market (Stock Code: 9470) ・Address: 2-11-8 Nishi-Gotanda, Shinagawa-ku, Tokyo 141-8510 ・Phone Number: 03-6431-1001 (main) ・Business Activities: Holding company established in 1946, operating in education and healthcare/welfare sectors Education: Classroom and tutoring businesses including "Gakken Classroom," Publishing and content such as learning materials, Preschool and school supplies including textbooks and childcare products Healthcare/Welfare: Senior housing with services, Dementia group homes, Childcare and after-school programs Global: Operations in over 150 countries