How likely are governments to make these changes? Look around the rich world today, and it looks rather optimistic. Japan, the country with the largest proportion of ageing population, has revised law concerning stabilization of employment of older persons. this starts taking effect, the mandatory retirement age will incrementally increase at the rate of year of age every three one years of age every three years, until 2025, when the mandatory retirement age reaches 65.Soon, older people will be able to work longer.