Japan's Centenarian Population Nears 100,000 Milestone

Japan has reached a significant demographic milestone, with its population of centenarians reaching 99,763 as of September 1, 2025. This figure marks a substantial increase of 4,644 individuals from the previous year, continuing a trend of growing longevity in the nation. The Ministry of Health, Labour and Welfare announced the record number, noting a consistent rise in the centenarian population over the past five decades. The data indicates that women form the vast majority of this group, comprising 88% of the total, with 87,784 centenarians being women and 11,979 being men.

Among the nation's oldest citizens are Shigeko Kagawa, a 114-year-old from Nara, and Kiyotaka Mizuno, a 111-year-old from Iwata, Shizuoka. Ms. Kagawa, a retired obstetrician and gynecologist, previously served as an Olympic torchbearer at the age of 109, symbolizing vitality in advanced age. Mr. Mizuno, born on March 14, 1914, has lived through four Japanese eras and maintains a healthy daily routine, including waking early and eating three meals a day, with a fondness for bananas and yogurt.

Geographically, Shimane Prefecture leads the nation in centenarian density for the 13th consecutive year, with 168.69 centenarians per 100,000 inhabitants. This contrasts with Saitama Prefecture, which has the lowest density at 48.50 centenarians per 100,000 people. Research suggests that factors such as a diet rich in grains, fish, and vegetables, alongside low-stress lifestyles and strong community support, may contribute to higher longevity rates in certain regions.

This demographic achievement occurs against a backdrop of significant societal challenges. Japan is experiencing a declining birth rate and an overall population shrinkage, with projections indicating a decrease of over 900,000 people by 2026. This trend places considerable strain on social security and healthcare systems, necessitating innovative policy solutions to ensure the well-being of an aging population and the sustainability of the nation's economic future. The growing number of elderly individuals, coupled with a shrinking workforce, presents a complex scenario that requires careful planning and adaptation to maintain societal balance and prosperity.