Wellness Joins The Challenger’s Resume as Co-Author; Book to Launch on Amazon.co.jp on May 22, 2026

Wellness Inc., provider of the personal doctor service Wellness Membership, announced that it has joined The Challenger’s Resume as a co-author. The book is supervised by Tatsuo Yamaguchi, Representative Director of Kizunasuke Inc., and produced by Listeners Inc. It will be released on Amazon.co.jp on May 22, 2026, with pre-orders now available. The book features 33 business leaders who have built relationships through the executive media platform KIZUNA EXECUTIVE. It visualizes the decision-making and thought processes of entrepreneurs and executives who continue to take on challenges, offering insights to future challengers and business leaders in similar positions. Rather than simply listing success stories, the book presents the authentic voices of executives through themes such as the background behind decisions in entrepreneurship and business growth, challenges faced and how they were overcome, values and beliefs important to leadership, and future outlooks and next challenges. Kotaro Nakada, Representative Director and physician at Wellness, discusses in the book his desire to eliminate “avoidable regrets” by seriously addressing preventive medicine as a doctor, as well as the origins of his entrepreneurship and future challenges. Through Wellness Membership, the company hopes to protect the health of many challengers and accompany them throughout their lives. Kotaro Nakada was born in Chiba Prefecture in 1991. Inspired by the doctor who treated him when he was hospitalized for asthma at age four, he decided to become a physician. After graduating from the Faculty of Medicine at Tokyo Medical and Dental University, now Institute of Science Tokyo, he became an emergency and general medicine physician. He founded Wellness Inc. in June 2018 and launched the preventive healthcare service Wellness. Today, the company supports the health of more than 1,000 executives, mainly business leaders and entertainers. Nakada is also the author of a book on strategic health methods for executives in the 100-year life era. Book details: The Challenger’s Resume is published by Listeners Inc., supervised by Tatsuo Yamaguchi of Kizunasuke Inc., scheduled for release on May 22, 2026, priced at 1,800 yen plus tax, and available at https://www.amazon.co.jp/dp/4908963363. Wellness Membership is a personal doctor service used by more than 1,000 members, mainly executives and business leaders. Dedicated doctors with expertise in preventive medicine plan customized medical checkups, analyze health data comprehensively, and provide consulting to help prevent high-risk diseases. The service is positioned as a strategic preventive medicine model for business professionals who want to view health as an asset and manage it over the medium to long term.