Japan’s centenarian population exceeds 100,000 as ageing pressures deepen

The practical consequence is a widening gap between the people drawing on age-related public support and the workforce financing it through taxes and social-security contributions. Labour shortages already affect construction, agriculture, transport, healthcare and social care, according to the report, with rural communities especially exposed as younger people move to cities. These pressures make the question broader than lifespan: Japan must sustain services, staff care roles and maintain public finances while its population becomes older and smaller.

Japan’s population peaked at about 128 million in 2008 and is projected by the National Institute of Population and Social Security Research to fall to 87 million by 2070, a decline of roughly 30 percent. The article reports that more than 800,000 people were aged 95 or above last year, compared with 700,000 births. Japan has introduced child allowances, subsidised childcare and parental-leave programmes, but these measures have not reversed the long-term fall in births. Globally, population ageing is also accelerating: the World Health Organization says life expectancy reached 73.3 years in 2024, and the number of people aged 60 or older is projected to increase from 1.1 billion in 2023 to 1.4 billion by 2030. Japan’s median age, estimated at 49 in 2023, was among the world’s highest.

A high centenarian count does not by itself establish that all older people are healthy, independent or receiving adequate care. The article describes several plausible contributors to longevity but says there is no single explanation, so no one diet, habit or policy can be credited for the result. Nor is a larger older population automatically a fiscal crisis: outcomes depend on employment, productivity, care provision, pension arrangements, public spending and migration policy. Japan’s foreign population has risen, but foreign nationals still account for about 3 percent of residents and larger-scale immigration remains politically contentious.

The key longer-term indicators are whether births, workforce participation and migration meaningfully alter the support ratio between working-age people and older residents. The article cites a projection that the share of residents aged 65 or older could approach 40 percent by 2070, making future population and care-system data especially consequential.