Changes in fertility in Japan by region: 1920-1965.
D001723:Birth Rate; D003710:Demography; D005060:Europe; D005260:Female; D005298:Fertility; D005843:Geography; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007564:Japan; D008393:Marriage; D012922:Social Change; D013223:Statistics as Topic; D014798:Vital Statistics