What's the Cause of the Low Birth Rate in Japan?

Japan's population is still growing at this point, but the rate which is growing is starting to decrease. The government estimates that figure to slide below 100 million and two thousand 53 in 30 years time. People aged 65 or older hit a record height of 28 point nine % of the population. And people 14 or younger accounted for record low, 11 point eight %. We've got an upside down population pyramid here.