Amazon Bestseller Ranking Category No. 1 (※) Even Before Release! "Let Go of Teaching," a Book on Development and Team Building by the Coach Who Produced Japan National Football Team Player Kaoru Mitoma and Led His University to No. 1 in Japan, is Now Available

Discover Twenty-One Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; President and Executive Officer: Naomi Taniguchi) published "Let Go of Teaching: Coaching to Unleash the Autonomy of Individuals and Teams" (authored by Masaaki Koido) on April 24, 2026. This book compiles the practical knowledge of human resource development and team building from Masaaki Koido, the director of the University of Tsukuba Soccer Club, who has produced a continuous stream of professional players and coaches, including Japan national team player Kaoru Mitoma, and led the team to its first double championship in 45 years in 2025. ■ Existing members grow into top-tier talent and achieve results. The secret lies in "not teaching." Director Masaaki Koido experienced the club's relegation to the Kanto University Soccer League Division 2 for the first time after the war and then led them to become the best team in Japan. His approach was not a management style of "teaching," "instructing," or "controlling," but rather coaching that draws out the autonomy of the members and the team. ■ Practical knowledge of coaching in one book How did the director actually engage with and interact with the members? How was a proactive and autonomous team created? Why does "not teaching" coaching work? This book compiles the practical knowledge gained so far, offering solutions to the concerns of all leaders and managers who lead teams, not just in sports coaching, such as: "Why don't they move unless told?" "How many times do I have to tell them before they change?" "What should I do about the difference in motivation within the team?" ■ "Self-Management Sheet" to foster autonomy This book introduces the "Self-Management Sheet" practiced by the University of Tsukuba Soccer Club, which encourages each member to clarify their goals and take action. It includes examples of University of Tsukuba Soccer Club alumni, including Kaoru Mitoma, showing how they thought and acted, and can be applied to your own teams and organizations. *Amazon Bestseller Ranking No. 1 in Books > Humanities > Philosophy > Pedagogy > Health and Physical Education (researched on 2026/4/15) ◎ Book Outline [Table of Contents] Chapter 1: Coaching to bring out "Your personal best" Chapter 2: Communication techniques to motivate members Chapter 3: Coaching to create the strongest team Chapter 4: Why "not teaching"? Chapter 5: Nurturing the next leaders [Author Information] Masaaki Koido Born in Gifu Prefecture in 1978. Associate Professor at the University of Tsukuba Faculty of Health and Sport Sciences. Director of the University of Tsukuba Soccer Club. After graduating from Gifu Prefectural Kakamigahara High School, he entered the University of Tsukuba, School of Health and Physical Education. While enrolled, he experienced reaching the finals twice in the All Japan University Soccer Championship in his third and fourth years. While attending graduate school at the University of Tsukuba, he joined Mito HollyHock. After one year as a professional player, he retired. In 2002, he became the head coach of the University of Tsukuba Soccer Club. After completing graduate school, he worked as a technical staff member for Kashiwa Reysol and an assistant coach for Shimizu S-Pulse and Gamba Osaka, before being appointed to the University of Tsukuba Faculty of Health and Sport Sciences in 2014. The following year, he became the director of the soccer club. He has produced many professional players and coaches, including Japan national team player Kaoru Mitoma. In 2025, he led the team to win both the Kanto University Soccer League and the All Japan University Soccer Championship, achieving a double championship for the first time in 45 years. [Book Information] Title: "Let Go of Teaching: Coaching to Unleash the Autonomy of Individuals and Teams" Release Date: April 24, 2026 Publisher: Discover Twenty-One Format: Paperback (softcover) / 248 pages ISBN: 978-4799332665 [Purchase this book here] Amazon https://www.amazon.co.jp/exec/obidos/ASIN/479933266X/d21_rs_pr-22 Rakuten Books https://hb.afl.rakuten.co.jp/hgc/34ae3b9f.60213531.34ae3ba0.3421f3bd/_RTLink78327?pc=http%3A%2F%2Fbooks.rakuten.co.jp%2Frdt%2Fitem%2F%3Fsid%3D213310%26sno%3DISBN%3A9784799332665&link_type=hybrid_url&ut=eyJwYWdlIjoidXJsIiwidHlwZSI6Imh5YnJpZF91cmwiLCJjb2wiOjF9 Kindle https://www.amazon.co.jp/exec/obidos/ASIN/B0FLJGBMYQ/d21_rs_pr-22