The news revolves around the increasing trend of cohabitation, or "de facto marriage", among Japanese couples before formal marriage. Despite criticism from conservative quarters, these couples are challenging traditional societal norms, opting to live together before making the lifelong commitment of marriage. The why and when can be traced to modern Japan's fast-paced lifestyle and changing social mores, with many younger adults seeking practical and emotional companionship in the face of work stress.

In Japan, traditionally, marriage has been a significant social institution regulated by cultural norms. The current trend of cohabitation before marriage is seen as bold and is a new phenomenon, often met with criticism by older generations. Legal issues around inheritance, child custody, and social security benefits tied to marital status add to the complexity of this issue. Moreover, the societal values centered on familial lineage and societal standing also come into play.

In countries like the US and EU, cohabitation is more common and less controversial. It is seen as a part of life for many couples prior to or instead of marriage. Legal frameworks in these regions are more accommodating towards such relationships, giving de facto couples certain rights and legal recognition.