Introduction: Psychiatric day-care services play a central role in community-based care in Japan. Recovery and related psychosocial factors are critical in promoting community participation of people with mental illness. This study aimed to reveal the relationships among activity information, personal recovery, and related psychosocial factors in day-care users. Method: Forty day-care participants answered self-report questionnaires. The following assessments were applied: Recovery Assessment Scale, Occupational Questionnaire, Perceived Devaluation Discrimination Scale, and 26-item version of World Health Organization Quality of Life (QOL). The correlations among the factors were analyzed. Results: Data for 35 people were analyzed. Total recovery score was strongly correlated with total WHOQOL-26 score ( r = 0.76, p < 0.001). Total QOL score was positively related with the value of activities ( r = 0.46, p < 0.05). Social QOL and total stigma score had a significant negative relationship ( r = −0.44, p < 0.05). Conclusion: Participation in activities was suggested to improve QOL. Although there was a strong relationship between recovery and QOL, it was unclear to what extent participation in activities was related to recovery. We should consider approaches regarding other factors to fully accomplish community integration and personal recovery.