http://onlinelibrary.wiley.com/doi/10.1111/jomf.12126/full ""
Single Motherhood, Living Arrangements, and Time With Children in Japan
JM Raymo, H Park, M Iwasawa, Y Zhou - Journal of Marriage and Family, 2014
...In contrast to the United States and other countries where nonmarital childbearing is common, the increase in single-parent families in Japan is due almost entirely to increases in divorce . The number of divorces nearly doubled
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