Changes in the social structure in Japan are leading to gradual changes in the personality of young individuals. These changes, in turn cause changes in adaptation or maladaptation, leading to the emergence of a new type of depression that is different from classical depression. Therefore, the Scale on Working Attitude Types (ScWAT) was developed in the present study, to assess the modern personality characteristics influencing on work. Scale items were developed by identifying the common features of the new type depression and the personality characteristics of young individuals in the modern Japanese society. By analyzing the data of 343 participants in their twenties, 5 subscales were extracted, and the validity and reliability of the scale were confirmed. Clear differences were observed in the personality and stress responses of individuals classified into 5 clusters using this scale. This result suggests that the ScWAT is useful to understand the personality of individuals, to aid stress management.