★ Authored by Dr. Akihiro Aoki, a leading authority in anti-aging medicine in Japan, this 2025 revised edition approaches the topic of extending healthy lifespan from the new perspective of “sleep breathing.” The content is based on medical evidence and the author’s personal practice.
★ The sleep-promoting bedding developed by the author, Ikutaka Toratani, has sold over 5 million units and holds five Japanese patents and international patents, offering practical solutions that have been market-tested.
★ It addresses the pain points of people with sleep disorders, providing immediately actionable methods such as “improving sleep posture with a towel” and “adjusting pillow height” without the need to replace bedding, which can be practiced on the same day.
★ Integrating medical theory with product development experience, it covers a comprehensive knowledge system from the respiratory mechanism to the selection of bedding, and has been reported by media outlets such as the Nikkan Kogyo Shimbun.
★ With physician review to ensure professionalism, it is suitable for the silver-haired group concerned about healthy longevity and young readers troubled by insomnia, helping to solve chronic fatigue and sleep quality issues.

Reported by Nikkan Kogyo Shimbun and LIFEHACKER!
Based on medical evidence and the author’s personal experience, this book explains the concept that “improving breathing during sleep can significantly extend healthy lifespan.”
It addresses the issues of bedding that hinder deep breathing and introduces the author’s self-developed “sleeping bedding that promotes deep breathing.” It provides specific guidance on what criteria to use when choosing new bedding and includes a guide to help readers make confident purchases.
It details methods that can be implemented immediately without changing bedding, such as adjusting pillow height and using a towel to improve sleep posture, to achieve an “easy-to-breathe sleep posture” that can be practiced on the same day.
It offers a previously overlooked perspective on “breathing during sleep,” targeting those troubled by insomnia and poor health, such as those who “want to extend healthy lifespan,” “want to fundamentally improve sleep quality,” and “want to eliminate insomnia and chronic fatigue,” written in an easy-to-understand manner. With physician review.

[Author] Ikutaka Toratani
President and Representative Director of ToraTani Co., Ltd.
Born in Ishikawa Prefecture in 1950. After graduating from the Department of Chemical Engineering (now Department of Chemical Systems Creation) at Doshisha University’s Faculty of Science and Engineering, he worked in the chemical industry before joining the underwear manufacturing company “Osaka Sewing.” He officially entered the manufacturing field, using three-dimensional structural design techniques to develop numerous underwear products. In 2005, he established “ToraTani Co., Ltd.” The “ToraTani 3C Shorts” series, utilizing three-dimensional cutting technology, has sold over 5 million units. In his early 60s, due to his own insomnia and atrial fibrillation, he noticed the significant impact of unconscious breathing, especially “sleep breathing quality,” on health. During his attempts with various health methods and bedding, he discovered the structural issue that “bedding body pressure hinders breathing.” After five years of independent trial and error and patent applications, he developed the world’s first sleep-promoting bedding, “ToraTani Good Circulation Bedding.” He obtained five patents in Japan in 2023 and applied for international patents in 2025.
He is currently dedicated to the lifelong mission of “extending healthy lifespan through breathing and sleep,” widely disseminating the “rediscovery of breathing” to society through product development, lectures, and writing activities.

[Reviewer] Akihiro Aoki
Internist / Specialist in Anti-Aging Medicine, Japan Anti-Aging Medical Association
Chairman of the Japan Aesthetic Internal Medicine Society / Executive Director of the Japan Health and Medical Society
Director of the Japan Well-Aging Certification Association
Evaluator of the Japan Anti-Aging Medical Association
Former Associate Professor of the Department of Aging Control Medicine at Juntendo University Graduate School
Born in Tokyo in 1961. After graduating from the National Defense Medical College, he worked as a metabolic and endocrine internist, engaging in clinical and research work on diabetes and obesity at the National Defense Medical College, Asahikawa Medical University, and the Self-Defense Forces Central Hospital.
In 1995, during the Tokyo subway sarin attack, he was dispatched from the Self-Defense Forces Central Hospital to St. Luke’s International Hospital, which received a large number of patients, to provide support as a Self-Defense Forces medical officer. He was the first to diagnose sarin poisoning on-site, using his knowledge and experience as a Self-Defense Forces medical officer. By directing accurate initial treatment recommendations, he saved many patients’ lives. In 2000, feeling the limitations of insurance medical system in the prevention of lifestyle diseases, he resigned from the Defense Agency. He entered the field of anti-aging (Anti-Aging) medicine and opened Japan’s first anti-aging clinic, “Ebisu Anti-Aging Clinic,” in 2004. In 2007, he became an associate professor of the Department of Aging Control Medicine at Juntendo University Graduate School. In 2023, he founded the Japan Aesthetic Internal Medicine Society and became its chairman. He is also involved in creating anti-aging menus for anti-aging restaurants, developing anti-aging exercises (Mona Lisa Exercise), and co-planning and reviewing anti-aging travel with travel agencies. He practices an anti-aging lifestyle daily, maintaining hormone age, brain age, and musculoskeletal age all 10-20 years younger than his actual age. As a leading figure in anti-aging medicine, he is active in magazines and television and has numerous publications.

Chapter 1: Why Can’t Fatigue Be Eliminated Even with Good Sleep? (Poor sleep is one of the signs of aging / Is physical discomfort a sign of aging or poor sleep? And more)
Chapter 2: The Amazing Health Effects of “Deep Breathing” (Just shallow breathing can waste air / Continuous shallow breathing leads to even shallower breathing And more)
Chapter 3: What is an “Easy-to-Breathe Sleep Posture”? (The main players in breathing are the diaphragm and intercostal muscles, with supporting roles from the body’s muscles and bones / The deep connection between sleep posture and breathing And more)
Chapter 4: “Good Sleep” Extends Healthy Lifespan (There are still many unknowns about sleep / The role of sleep is not just to rest the brain and body And more)