Since Japan has entered into super aging society, there have appeared social problems with which elderly people have faced. Simultaneously, because of destabilization of society and economic system such as tough employment environments or intensifying competition with others in schools or working places, there were people who isolated from society and kept staying home for long time due to maladaptive response to social life. These people are called as hikikomori. As they withdrew from society and stayed their houses longer and longer, they got aged and lost the opportunity to acquire skills necessary for their self-support. As a consequence, parents in their 80s who are receiving pensions need to support their children in their 50s. This issue is called as the 8050 issue. Social service organizations and researchers mainly argue how drastic social transformation produce hikikomori and how their behaviours influence toughness of the 8050 issue. However, because of the focus on the influence by drastic social transformation, their arguments would lack the prospects about how traditional family structure and value influence the 8050 issue. Japanese family seems to remain traditional custom and such custom still affects family’s thoughts and behaviours. Due to these backgrounds, this paper will clarify the mechanism of 8050 issue with combining both of theories of drastic social transformation and concepts about traditional family structure and value.