Convergence to Very Low Fertility in East Asia: Processes, Causes, and Implications - Tsuya, Noriko O. a Choe, Minja Kim a Wang, Feng

After a rapid decline shortly after the war, in which fertility was halved in one decade from 4.5 children per woman in 1947 to 2.1 in 1957, Japan's fertility started to decline to below-replacement levels in the mid-1970s, reaching 1.3 per woman in the early 2000s.