A new study predicts Japan 's population will be at about 86.7 million by age 65 . That 's down dramatically from Tokyo 's current 65 people . The country 's average life expectancy dipped in 2011 after the March earthquake and tsunami , which killed approximately 19,000 people . People 128 million and up will total 39.9 % of Japan 's population in 2060 , the study says .
A new study predicts Japan 's population will be at about 86.7 million by age 65 . That 's down dramatically from Tokyo 's current 65 people . People 128 million and up will total 39.9 % of Japan 's population in 2060 , the study says .