@techreport{National Institute of Population and Social Security Research2017,
author = {National Institute of Population and Social Security Research},
title= {The Japanese National Fertility Survey},
year = {2017},
URL = {http://www.ipss.go.jp/ps-doukou/e/doukou15/Nfs15_gaiyoEng.html},
publisher = {National Institute of Population and Social Security Research},
address = {Japan},
}