Japan's centenarian milestone masks demographic crisis threatening economy

Japan has crossed a threshold that sounds like a triumph but reads like a warning. The country is now home to more than 107,000 people aged 100 or older—a record that has climbed for 56 consecutive years. The Ministry of Health, Labour and Welfare confirmed the figure for 2026, an increase of nearly 8,000 from the previous year. Almost nine in ten of these centenarians are women. Health Minister Kenichiro Ueno marked the milestone with measured optimism, crediting advances in medicine, healthy diets, and active lifestyles. But the celebration obscures a harder arithmetic: Japan is aging while its population shrinks, and the workers who will pay for the care of the old are simply not being born.

The numbers tell the story plainly. Nearly 30 percent of Japan's residents are already 65 or older, a proportion expected to approach 40 percent by 2070. Last year, more than 800,000 people were aged 95 or above. In the same period, only 700,000 babies were born. The country's total fertility rate—the average number of children a woman will have in her lifetime—fell to 1.14 in 2025, the lowest on record. Demographers generally agree that a rate around 2.1 is needed to sustain a population without immigration. Japan's population peaked at roughly 128 million in 2008. The National Institute of Population and Social Security Research projects it will fall to 87 million by 2070, a decline of about 30 percent. The decline is already visible in the census: 45 of Japan's 47 prefectures recorded fewer residents in 2025 than five years earlier. Only Tokyo and Okinawa grew.

Why do Japanese people live so long? The answer lies in a convergence of factors. The traditional diet emphasizes fish, vegetables, and rice while keeping saturated fat low. Obesity rates remain significantly lower than in many Western countries. Daily life encourages movement—walking, cycling, and the use of public transport are common even among older people, and group exercise is widely practiced. Japan's universal health insurance system provides broad access to treatment and medicines at costs far lower than in countries like the United States. These conditions have created a population that ages slowly and lives long. The achievement is real. The problem is what comes with it.

The economic pressure builds in a straightforward way. As the population ages, more people of pension age require higher levels of social care and medical intervention. Fewer working-age people are available to support them through taxes and social-security contributions. Public finances strain. The younger workers carrying the system feel the weight. Prime Minister Sanae Takaichi has named population decline and falling birth rates as major national challenges, warning that the trend threatens Japan's economic and social foundations. The government has tried to reverse the decline through child allowances, subsidized childcare, parental leave programs, and other incentives. None has yet worked. Social scientists point to deeper causes: fewer people are marrying, or marrying later when childbearing becomes less likely. Younger adults worry about insecure employment, stagnant wages, and demanding working hours. Women's increased participation in the workforce has not been matched by an equal sharing of childcare and household responsibilities, making parenthood particularly difficult to combine with a career.

The labor shortage is already acute. Construction, agriculture, transport, healthcare, and social care all report difficulty finding workers. Rural areas face the sharpest challenge as younger residents migrate to cities, leaving aging communities with fewer workers and declining public services. Immigration could help offset the shortage—Japan's foreign population has risen in recent years—but foreign nationals still account for only about 3 percent of the population, and proposals to accept substantially more migrants remain politically contentious. The country faces a choice between accepting demographic decline or accepting demographic change through immigration, and neither path is politically easy.

Japan is not alone in aging. The World Health Organization notes that longer life expectancy is one of humanity's greatest achievements, a result of advances in social and economic development and health care. Global life expectancy reached 73.3 years in 2024, up 8.4 years since 1995. The number of people aged 60 or older is projected to rise from 1.1 billion in 2023 to 1.4 billion by 2030. But the transition is considerably more advanced in some countries than others. Japan's median age stands at 49, the oldest in the world. Italy follows at 47.5, Portugal at 46.2, Greece at 45.7, and Germany at 45.1. Japan is not facing a unique problem—it is simply facing it first, and most acutely. How it responds will likely shape how other aging societies respond to their own demographic futures.