2008 年 6 巻 1 号 p. 1_67-1_72
This interview surveys on "Subjective age" of dankai-generation were done to improve the quality of their welfare services, and the subjective age formation in an individual living environment was considered. The transition patterns of the subjective age were graphed case by case, and classified into seven types in total. From talking about their life history, the subjective age formation resulted from "change in the living environment" such as significant change in their life events and relationships. Through all interview results, "Temporal Landmark" theory by Shum (1998) was used to specify the regulated factors which caused "Self-youth" phenomenon that the subjective age was younger than the calendar age, and to examine how these factors influenced the subjective age formation. In addition, a self-youth mechanism was derived that the dankai- generation was youthful and energetic forever as if a lot of experiences of latter middle-aged people were activated as a landmark, and as if self-youth by landmark formation of the dankai-generation was caught affirmatively. Such a youthful dankai-generation was viewed as "Active senior" with discussion about a self youth mechanism, and a desirable transition model of subjective age to have time by youthful feelings as much as possible was presented at the end.