NAGANO—Okinawa Prefecture once boasted the longest life expectancy in the country, but it has now dropped well out of the top 10.

Healthy teeth have long been framed as a cosmetic bonus, but new data from Japan suggests they may be as fundamental to longevity as blood pressure or cholesterol. A massive national study of older ...

Okinawan men fell from first to 43rd while women slipped to 16th in the last life expectancy survey, a slide that is expected ...

Having a greater number of missing or decayed teeth has been linked to a shorter life expectancy in a new study.