In 1947 the proportion of Japanese over 65 was around 5% of the population, well below that in Britain, France or America. Today the elderly account for one-fifth of the population, and average lifespans have grown remarkably. Life expectancy today is 82, up from a little over 50 in 1947. | In 1947 the proportion of Japanese over 65 was around 5% of the population, well below that in Britain, France or America. Today the elderly account for one-fifth of the population, and average lifespans have grown remarkably. Life expectancy today is 82, up from a little over 50 in 1947. |