The differences between the two types of coresidence are consistent with a shift of intergenerational living arrangements in Japan from a preventive arrangement to a contingent arrangement for older parents in need. We suggest that intergenerational family traditions contain a great amount of plasticity to accommodate societal modernization by adapting to the changing cultural and socioeconomic contexts of the society.

Relatively high prevalence of coresidence between older parents and adult children in Japan is generally interpreted as a structural manifestation of traditional family norms; however, recent socioeconomic changes in Japan have called this into question. This study analyzes national data from older people in Japan to examine the reciprocal relationship between two types of inter-generational coresidence and normative beliefs about traditional stem-family living arrangements. Two-stage least squares regression analysis reveals that coresidence with married children and traditional normative beliefs mutually reinforces each other, whereas coresidence with unmarried children strengthens normative beliefs, but not vice versa. The authors argue that the composition of multigenerational households of older people in Japan is shifting toward a type where instrumental concerns of both generations take precedence over traditional cultural ideology. Traditional norms still motivate the formation of stem-family households but are also used to justify instrumentally driven living arrangements with single children.

We investigated the conditions under which married children live with their older parents in Japan. We focused on how needs and resources in each generation are associated with whether married couples live with their parents in parent-headed and child-headed households, and we also investigated difference in power relations between older and younger generations and between children and their spouses. We analyzed a nationally representative sample of older parents (n  =  3,853) and their married children (n  =  8,601) from the 1999 Nihon University Japanese Longitudinal Study of Aging (NUJLSOA). Mutinomial regression revealed that married children with relatively affluent parents tended to live with them in parent-headed households and that married children with parents who are in relatively poor health or who are widowed tended to live with them in child-headed households. We also found that less-educated married children tended to live in the households of their higher-income parents, suggesting that parents may be "purchasing" traditional arrangements with less-affluent children. In addition, children with an educational advantage over their spouses were more likely to have parents living with them in child-headed coresident households. We conclude that traditional multigenerational coresidence has become a commodity negotiated within families based on relative resources and needs within and across generations.

Japan presents a unique social laboratory in which to examine how family support impacts on older adults’ psychological wellbeing. This is because of its cultural climate where distinctively different expectations of old-age independence and the traditional norm of filial piety coexist. This study investigated how structural and functional dimensions of the family support of older Japanese parents influence their psychological morale, and whether the impacts of family support on parents’ morale vary depending on the parents’ belief in the traditional cultural norm of filial piety. Four waves of data from the Nihon University Japanese Longitudinal Study of Aging (NUJLSOA) collected in 1999, 2001, 2003 and 2006 were analysed. Combining the two- or three-year span of longitudinal data between each wave (N=3,882), an ordered logistic regression analysis was undertaken. The results reveal that although parents who were widowed or received emotional support from a child tended to report a lower level of morale, the negative influences of such support tended to be mitigated if the parent agreed with the traditional cultural norm of filial responsibilities. These results imply that the meaning and benefit of family support may differ depending on the degree to which Japanese older parents support the traditional norm of filial responsibilities.