A series of career-related educational programs has been implemented over the last decade in Japan. Students are expected to learn about what their professional career and, most importantly, personal lifestyles would be in the future from their freshman years on. It is thus important that students receive adequate programs that focus attentions on their life roles based on their behavioral and cognitive experiences; one of which would concern one's subjective well-being in everyday lives. The main purpose of this study was to conduct an outcome evaluation of the Three Good Things in Life (TGT) exercise as implemented in non-clinical, Japanese university settings. A sample of 248 freshmen (88 males, 150 females, and 9 unknowns) in a medium-size university in the Tokyo metropolitan area were recruited (Mean age ＝ 18.3; SD＝0.56), where they received the TGT exercise program across a three-week period of time. The outcome evaluation was conducted under the randomized waiting list control design. Two sets of 2 (Group) x 3 (Time) repeated measure Analyses of Variance (ANOVAs) revealed that there was a main effect of Group and Time on the negative affect (Dysphoria) only; neither interaction nor main effect was found on the positive affect. Directions for future research and applications were discussed.