World's oldest person dies at 115 years old

Around the world, thanks to better health and nutrition, people are living longer than ever before. But despite the advancements, the world’s oldest people are clustered in countries like Japan, Switzerland, Australia and Singapore.

Japan, ranked first in the list of countries with the longest life expectancies, recently lost its oldest resident, and the oldest person on the planet, with the death of 115 year-old Koto Okubo.