A survey by the Japanese government has said that the dwindling birth rate is expected to cut Japan's population by 30% over the next 50 years.
(Seemingly the birth rate has been falling steeply for over half a century. In the early 1970s it passed the replacement level of 2.1 births per woman and in 2005 hit a record low of 1.26. Luckily we are all living longer.)