About the author

John Ishiguro, MD is a board-certified orthopedic surgeon in Tokyo. His clinical work is hip and knee replacement, knee ligament reconstruction and joint-preserving surgery — in other words, helping people keep moving when the body's frame starts to fail.

Why this site exists

Japan is one of the oldest societies on earth, and orthopedic clinics here see, every day, what decides whether later life is active or limited: muscle, bone and joints. Japanese orthopedics even has its own name for age-related decline of the locomotive system — locomotive syndrome — coined by the Japanese Orthopaedic Association.

Meanwhile, most longevity advice in English is written by people who never examine a stiff knee or a weak hip. This site is the view from the operating room and the clinic, written for anyone who wants to stay strong, mobile and young for longer, and honest about how good the evidence really is.

What you will and won't find here

• Articles that grade every main claim from A to D — see how we grade evidence.
• Topics from muscle and bone to connective tissue, plus evidence checks on popular skin and hair claims.
• No affiliate links, no sponsored content, no supplements for sale.
• No individual medical advice. If you live in Japan and want an orthopedic opinion, the author's practice site explains how consultations work.

Credentials and practice

License and board-certification details, clinical focus and contact information are on the author's practice site: https://johnishiguro.com.

Conflicts of interest

The author is a practicing surgeon. Some articles discuss treatments he provides, such as joint surgery or injection therapies; those articles say so at the top. He receives no payment from companies whose products are discussed on this site.