This study examined the concept of successful aging using an ethnographic grounded-theory approach. Seventy-seven Japanese American older adults participated in focus groups. Participants perceived successful aging as optimal functioning in the following areas: Physical health, psychological health, cognitive functioning, socialization, spirituality, and financial security. The content of each dimension represents both culture-specific and culturally-universal elements. This new multidimensional model of successful aging was compared to Rowe and Kahn's (The Gerontologist 37:433-440, 1997) and Phelan et al.'s frameworks (Journal of the American Geriatric Society 52:211-216, 2004) of successful aging. The model of successful aging generated from this study appears to be more comprehensive than existing models and incorporates sociocultural experiences.