Why Is Japan a Global Longevity Leader?

Dr. Yasuhiro Nishizaki, President of the Japan Society of Health Evaluation and Promotion

Why is Japan a global longevity leader? Researchers around the world are taking note of a unique preventive-medicine practice in Japan. A comprehensive health screening known as Ningen Dock (literally, “human dock”) is built on the idea that the body should undergo regular full checkups, just like a ship brought into dry dock for thorough inspections.[1]

Dr. Yasuhiro Nishizaki, President of the Japan Society of Health Evaluation and Promotion, is at the center of this preventive-medicine community.

“The Japanese people have made a habit of keeping a close watch on their own health, and I believe that’s the foundation behind Japan’s status as one of the world’s leaders in life expectancy.”

The strength of Japan’s health checkup system, as Dr. Nishizaki describes it, is not just technical. Its current form is the product of more than 70 years of legislation, growing expertise, and a culture in which checkups gradually became second nature — a long, hard-won history that, he says, gives Japan a foundation no other country can replicate overnight.

A System Shaped by History: In the Making Since the 1950s

Routine health checkups in Japan trace back to tuberculosis prevention efforts in the 1950s. At the time, tuberculosis was the disease that posed the greatest threat to the nation’s health, and a mass health-screening program was created to combat it. Through the 1960s, that program developed alongside nutritional guidance into the formal system in place today.

Today, the provision of routine health checkups is institutionalized by law in Japan, and the majority of the population undergoes some form of checkup every year. These checkups include:

• Worksite health checkups under the Industrial Safety and Health Act
• Specific health checkups under the Act on Assurance of Medical Care for Elderly People (the so-called metabolic syndrome checkup, which insurers are required to provide to those aged 40–74)
• Cancer screening under the Health Promotion Act
• School health checkups under the School Health and Safety Act

For comparison: about 3 million people undergo Ningen Dock — the more thorough, voluntary screening — each year, while roughly 30 million undergo the Specific Health Checkups described above. Through these programs, it is estimated that at least 15,000 people annually receive a definitive diagnosis of one of the five major cancers.

That kind of diagnostic strength was not built overnight; it is the product of more than half a century of legal refinement and effort on the ground. [2, 3, 4]

From New Technology to Established Practice: The Development of Automated Health Checkups

Japan’s health checkup system also has a long history of adopting and developing technology. Until the 1960s, most laboratory testing in Japan was performed manually. From the late 1960s through the 1970s, automated analysis technology was introduced from the United States, making it possible for multiple blood test parameters to be processed in a single batch by machine and for results to be produced within one day. Japan was also part of the international push to bring this automation into health checkups, an effort organized through the International Health Evaluation and Promotion Association (IHEPA), which was founded with a three-region structure: Region I (the Americas), Region II (Europe), and Region III (Asia and Oceania). Dr. Shigeaki Hinohara of St. Luke’s International Hospital in Tokyo, a leading advocate for preventive medicine in Japan, joined IHEPA and worked with its leaders to establish the organization’s Japan branch. That branch later extended to Taiwan, helping bring both countries into IHEPA’s international network. [5, 6]

The Ningen Dock Society, founded in 1969, became the central organization behind Japan’s framework for comprehensive health screening. Separately, a study group focused on international approaches to automated health checkups was renamed the Japan Society of Health Evaluation and Promotion (JHEP) in 1985. JHEP, now led by Dr. Nishizaki, was built on the idea that automated health checkups should deliver results quickly. The United States and Europe, by contrast, relied on the same automation technology, yet never turned health checkups into a formal, institutionalized system. Dr. Nishizaki attributes this divergence to differences in institutional frameworks. [7]

“In the United States and Europe, one contributing factor [in checkups never taking root as a nationwide system] appears to be that an entity responsible for providing health checkups was not clearly defined. That is, responsibility fell to the individual, not the state, so the dominant model was insurance companies offering checkups to prevent the deterioration of their enrollees’ conditions, and checkups never took root as a system covering the entire nation.”

In Japan, the law required checkups and screenings to be carried out, with companies and local governments serving as the “administrators” responsible for running them. When a checkup turned up a problem, the country’s universal health insurance system was there to connect people to further care quickly and affordably. That safety net for follow-up care is what ultimately set Japan apart from the United States and Europe. The United States, too, has facilities that pursue checkups proactively, but whether someone actually goes is largely left up to individual choice.

How the System Built Its Workforce: The Allied Health Revolution

Over the decades, Japan built more than a legal framework requiring employers and insurers to offer health checkups. “It is the people trained within that framework who have made Japan’s health checkups the best in the world,” Dr. Nishizaki stresses. The late Dr. Shigeaki Hinohara championed a principle he phrased like scripture: “Health checkups shall not stand on physicians alone.” In other words, physicians alone cannot keep health checkups running. In practice, the core work falls to nurses, public health nurses, and registered dietitians, the non-physician medical professionals commonly called allied health professionals. 

“At the foundation of our society lies the recognition that nurses, public health nurses, registered dietitians, pharmacists, and other allied health professionals, along with certified exercise instructors, are just as essential to health checkups as physicians.”

This philosophy is embodied in the Japan Society of Health Evaluation and Promotion.

Thorough and Affordable: What the System Delivered

When comprehensive health screening first launched at the National Tokyo First Hospital in 1954, it cost more than the average monthly starting salary at the time, and only political and business leaders could afford one. As routine health checkups spread nationwide, they became both more thorough and more affordable. Laws requiring annual checkups to be offered created a market so large that medical equipment came into wide use, testing became standardized, and costs came down. The same economies of scale also shape the prices paid by patients who travel to Japan for checkups. [8]

The Five Major Cancers and Japan’s Lead in Endoscopy

Japan’s national screening programs cover all five major cancers (stomach, colorectal, lung, breast, and cervical), while those of the other G7 countries have traditionally covered only colorectal, breast, and cervical cancer. Stomach cancer screening in particular relies on two methods: endoscopy, a field Japan has led since the 1960s, and double-contrast barium X-rays, a high-precision technique developed in Japan. Japan also built the gastrocamera, the forerunner of the modern endoscope, and has a large pool of skilled endoscopists. More comfortable options are widely available too, including transnasal endoscopy (a thinner scope passed through the nose) and sedation. [9]

Dr. Nishizaki sums up what makes Japan’s system strong.

“What sets Japan apart most is that early detection leads immediately to appropriate medical care. It doesn’t stop at early detection. It leads directly to high-quality treatment. That continuity, from early detection to early access, is the core advantage of Japan’s health checkup system.”

When a checkup finds a problem, the system is ready to investigate it further and treat it. Universal health insurance makes that possible, and Japan put it in place earlier than many other countries.

Checkup Culture’s Next Step: Anti-Aging and Eastern Longevity

With the system and a trained workforce in place, new ideas have room to grow. For 20 years, Dr. Nishizaki has offered an Anti-Aging Checkup. Finding disease is only part of it. The main focus is guidance that helps people push back against aging. Each checkup includes a 30-minute consultation in which a physician uses the patient’s data to advise on managing their health, along with exercise guidance from a certified exercise instructor.

Today, he adds, the focus has shifted from anti-aging to longevity. “In the West, longevity carries an image of fighting the fate of aging through perfect nutrition and hard training. In Japan and elsewhere in the East, longevity is a fundamentally different concept, and that’s fine. In fact, I see [aging] as natural.”

At the heart of the Eastern longevity Dr. Nishizaki describes is what he calls “narrative”: reaching a shared understanding with each person through conversation. It calls for gentle coaching rather than lecturing from above. The losses that come with age are not treated as defeat, and the goal is well-being. As he puts it:

“They say joy keeps us young and sorrow makes us old. I believe the ultimate goal of anti-aging medicine is to help people face the losses that come with age without letting sorrow take over. We all die someday. What matters is how we hold on to our well-being along the way.”

This approach echoes Bruce Lee’s famous line from Enter the Dragon: “Don’t think. Feel.” It reflects an Eastern way of thinking that values not only theory but also each person’s senses, circumstances, and intuition. This philosophy grew out of half a century of individual-focused care within Japan’s checkup system.

The View from Abroad

Opinion abroad on Japan’s routine health checkups is mixed, and Dr. Nishizaki takes the criticism seriously.

“An OECD report has raised questions about whether healthy people need their blood sugar and lipid levels tested. Japan, on the other hand, assesses body measurements, lipids, and blood sugar together, and takes a systematic approach to improving them.”

Dr. Nishizaki accepts these points and looks ahead.

“It is a fact that Japan is one of the world’s leaders in healthy longevity. We want to keep building evidence on the role health checkups play in that.”

Where JHEP Goes from Here

JHEP’s next priority is strengthening dental and gynecological checkups, and it has already set up a working group to study them. It also plans to build Japan’s expertise in sarcopenia (age-related muscle loss), frailty, and dementia care into its checkup packages. As populations age worldwide, this is an area where Japan, with one of the oldest populations of any country, has unusually deep experience.

“Right now, the Specific Health Checkup has more eligible people and more participants than any other checkup in Japan. But in older age, the main concerns shift from metabolic syndrome to sarcopenia, frailty, and dementia. Japan is doing leading-edge work in these areas as well, and that work is well regarded abroad.”

Stroke was the leading cause of death in Japan until 1981, when cancer took its place. Salt-reduction policies starting in the late 1960s, better blood pressure treatment, and other medical advances brought stroke deaths down dramatically. Government action changed what Japanese people die of, and Japan has spent half a century building proof that lifespan is not destiny. [10]

“Almost every country will soon face the challenges of an aging population. I am confident that what Japan has developed, from health checkups and health guidance to elderly care and anti-aging, will make a major contribution to medicine worldwide.”

Can Other Countries Follow Japan’s Lead?

No single technology or policy explains the strength of Japan’s checkup system. It grew out of decades of laws, workforce training, cultural habits, and organized follow-up care, which is why other countries can’t simply copy it. Still, Dr. Nishizaki believes the same approach can work elsewhere if individual companies or local governments adopt it, just as they did in Japan. TSMC, the Taiwanese chipmaker, shows what that could look like. Consider how often each of these groups gets a checkup:

• Taiwan’s general public: about once every three years
• TSMC employees in Taiwan: once every one to two years
• TSMC employees in Japan: every year
• TSMC Japan employees receiving health guidance: every six months

“This group shows a clear gradient in how checkups are organized and how often they happen. If we could run a comparative study on the relationship between checkup opportunities and disease detection rates, it could yield extremely valuable data.”

Because Japanese law requires checkups to be offered so widely, it is hard to find enough people who skip them to make a fair comparison. Comparing Japan with countries that lack such a system, he says, could provide the strongest evidence of how well Japan’s checkup culture works.

What Sets Japan’s Routine Health Monitoring Apart

Looking back over this history, Japan’s strengths in routine health checkups and comprehensive health screening were built in four layers.

First, the system itself. Starting with tuberculosis prevention in the 1950s, checkups became a formal system in the 1960s, and decades of legal reforms since then have built a base of roughly 30 million people screened each year. That scale is what makes thorough testing possible at a reasonable cost.

Second, technology. Automated analysis introduced from the United States in the late 1960s took hold and advanced within Japan’s checkup system, leading to the founding of the Ningen Dock Society in 1969 and the launch of the Japan Society of Health Evaluation and Promotion in 1985.

Third, people. The late Dr. Hinohara’s principle that “health checkups shall not stand on physicians alone” gave rise to a multidisciplinary organization built around allied health professionals, along with a formal system for training them.

Fourth, evolution. Routine health checkups laid the groundwork for the Anti-Aging Checkup, launched in 2006, and for the philosophy of Eastern longevity. Japan’s experience with national prevention efforts, such as the salt-reduction policies that sharply cut stroke deaths starting in the late 1960s, also gives a solid basis for the next generation of checkup packages for an aging society.

Recreating an entire system built up in these four layers is not something that can be achieved overnight. That is exactly what sets Japan’s system of routine health monitoring apart.

“Japan’s health checkups have advanced to a point where other countries cannot easily catch up.”

A Message for Anyone Planning a Comprehensive Health Screening in Japan

“If you can, I hope you will come to Japan with plenty of time to spare, with the goal of focusing on your own health and wellness. I believe that will make the experience many times more valuable.”

References

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