Objective: Tremendous earthquakes occurred around the north area of Japan in March 11 of 2011. Soon afterward, Tsunami also damaged everything on the coasts of three prefectures of Tohoku. The fast aids such as lifeline and foods have been replaced by the recent needs such as job and accommodations for survivors in the process of restoration. In the same way, the focal point on mental health has changed from the acute to chronic phase. While interventions have been largely directed towards the survivors suffering mental health problems, different types of interventions have been expected to aim at building positive mental health over time. Specially, ideas are necessary for children in keeping their good mental health as well as preventing for mental health problems although they are influenced from physical and social environments. From what we have learned about resilience from studies in positive psychology, children seem to do best when ordinary needs are strengthened. So anything that supports building self-regulation, or having strong connections with friends, family members, and caring adults, or being part of consistent community resources will all help resilience. The purpose of this study is to develop and to evaluate the mental health promotion campaign for children in the Tsunami disaster area. Methods: We have replicated success of the Mentally Healthy WA, Act-Belong-Commit campaign (Donovan, 2010) as population approach to enhance resilience for children in the area stricken by disaster although we slightly changed the concepts as if Act-Belong-Challenge in Japanese. First, we examined the degrees of each Act- Belong-Challenge and also scores of state-trait anxiety by the questionnaires for 236 elementary school children of the area prior to the campaign. After that, we begun the campaign by the multiple strategies such as posting the poster in each class room, encouraging the activities from teachers in accordance with instructional manuals, providing with some goods such as seal and sticker, delivering the recommendation explaining the purpose to caregivers and so on. Results: Children in the Tsunami disaster area showed significantly smaller scores for each Act-Belong-Challenge and state-anxiety, but not trait anxiety, compared to the control children of the school out of disaster. Although this campaign is in progress, we are expecting to improve their scores of Act-Belong-Challenge and then to lead to their stress relief shown in lowering anxiety score.