Key Facts
• As of September 15, Chiba Prefecture has 3,580 centenarians, up by 289 from last year.
• This marks a 1.6-fold increase compared to 2,231 centenarians in 2015.
• Women account for 88% of centenarians, totaling 3,171, surpassing 3,000 for the first time.
• Men make up 409 centenarians, an increase of 19 from the previous year.
• Chiba ranks 8th among Japan’s prefectures in centenarian population.
• The oldest resident is a 112-year-old woman from Kimitsu City, born in 1912.
• The oldest man is 108-year-old Eito Kowase from Tateyama City, born in 1917.
• Chiba City has the highest number of centenarians at 460, followed by Funabashi City (292) and Matsudo City (254).
Summary
Chiba Prefecture has reached a record high of 3,580 centenarians as of September 15, 2025, reflecting a 1.6-fold increase over the past decade. Women dominate this demographic, comprising 88% of the total, with their numbers surpassing 3,000 for the first time. The oldest resident is a 112-year-old woman from Kimitsu City, while the oldest man is 108-year-old Eito Kowase from Tateyama City. Chiba City leads in centenarian population with 460 individuals, followed by Funabashi and Matsudo. This growth highlights the acceleration of Japan’s aging society, driven by advancements in medical technology.
