The aim of this study was to reveal behavior and thought constructing life skills in Japanese adults toward consideration of life skills training for adults. Descriptions of life skills were collected as text data from 400 adults. Co-occurrence network analysis found 40 instances of behavior and thought from the data. Several factors obtained were similar to those in previous studies (e.g., “positive thinking,” “planning,” “interpersonal manner,” etc.). Additionally, the original factors were also identified (e.g., “searching on social media,” “skeptical attitude toward information,” “judgment of profit and loss,” “imagining the worst situation,” “judgment of the appropriate psychological distance,” “maintaining the appropriate psychological distance,” etc.).