#Japan #Tokyo #children's education #Daidai Daiji #Kazuhide Hirayama

Introducing 'Daidai Daiji Boku no Karada'

A new children's book titled Daidai Daiji Boku no Karada is set to hit bookstores on January 26th, 2026, published by Takarajima. With the guidance of Kazuhide Hirayama, the president of Shuwa Seiyaku Co., Ltd. and director of the Kazuhakata Clinic, this picture book aims to foster a positive understanding of boys’ bodies among young readers.

The Essence of the Book

Daidai Daiji Boku no Karada gently introduces children to various concepts related to body awareness, personal care, and the natural differences that exist among individuals. The story revolves around a father-son duo during a bath time encounter, allowing children to learn about their bodies in a comfortable and engaging setting. This book is particularly special as it incorporates medical knowledge in an accessible narrative format for both children and parents—something still relatively rare in Japan.

Story Synopsis

In the book, a young boy named Haruto, while taking a bath with his dad, notices that their bodies are not the same. He wonders why his dad’s body looks different from his and how each of his friends has some unique differences as well. The book reassures children that these variations are completely normal and emphasizes caring for the private areas of their bodies. It teaches that taking care of one's body begins with understanding its significance and maintaining cleanliness.

The Inspiration Behind the Book

Many parents express the urgent need for age-appropriate sexual education for preschoolers but often struggle with how to approach the subject. Common questions arise about using proper terminology for body parts, explaining the concept of private zones, and discussing care routines without discomfort.

Recognizing that children naturally become curious about their bodies between the ages of three and four, this book was created to meet the needs of many families seeking an easy and gentle way to initiate conversations about their physical bodies. Parents can read this book with their children to help create a solid foundation for body positivity and understanding.

Insights from the Medical Supervisor

Kazuhide Hirayama, the medical supervisor and director of Kazuhakata Clinic, emphasizes the importance of providing accurate information about the human body from an early age. He stresses that the understanding of private zones should be part of a broader dialogue about personal boundaries while also teaching children that it’s okay for bodies to look different. The book acts as a guide for promoting healthy habits and provides straightforward instructions on caring for one's body in a relaxed manner.

Key Features of the Book

• - Promotes Acceptance: The book reassures children that they do not need to compare themselves to others.
• - Illustrative Learning: Key concepts about private zones are visually comprehensible.
• - Professional Guidance: Parents and children can learn proper care routines in a natural context.
• - Fosters Communication: The structure of the book encourages dialogue between parents and children, making it a valuable resource for family education.

Bibliographic Information

Title: Daidai Daiji Boku no Karada
Editor: Kazuhide Hirayama
Illustrator: Kazuto Sasaki
Price: 1,300 yen + tax (1,430 yen total)
Release Date: January 26, 2026
Pages: 32 (full-color)
Publisher: Takarajima
ISBN: 978-4-299-07373-0

About the Contributors

Kazuhide Hirayama:
Director of Kazuhakata Clinic and president of Shuwa Seiyaku Co., Ltd. He is a renowned specialist in urology with over 20,000 surgeries performed and emphasizes clear communication to ensure patient comfort.

Kazuto Sasaki:
An illustrator and designer, he has illustrated multiple children's books, seamlessly combining art with educational content.

This book is not only a fun read but also a vital educational tool, fostering healthy communication about bodies. Parents searching for resources to facilitate discussions about body awareness and care will find this to be an invaluable addition to their child's library.