Japan's population peaked in 2008 at 128.1 million before starting to declining due to a longer life expectancy, a low fertility rate and minimal net immigration.
Japan's fertility rate (among the lowest in the world) of 1.2 children born for every Japanese woman is below the replacement level of 2.1 children per woman needed to sustain the existing population. By 2050, the forecasted population is expected to contract by more than 25 % to 95 million people.
The government are designing policies to boost birthrates and stem the shrinkage in population.
By providing more childcare places, woman can return to work after having children. More woman in the workforce could change Japan's GPD by 15% without any change to the population.
Japan has traditionally averse to immigration with a native population of 95%. By allowing 250,000 foreigners every year, the total population could increase to 100.7 million in 2065
An idea that Japan is considering is a technology-based solution to the shrinking workforce: robots.