 The Great East Japan earthquake of 2011 caused extensive damage along the Pacific coast of the Tohoku region. In order to address these issues, Tohoku University and IWATE Medical University have launched the Tohoku Medical Megabank project, TMM. This project includes two prospective cohort studies, the TMM community-based cohort study, TMM-COM cohort study, and the TMM birth and three-generation cohort study, TMM birth-recohort study. These studies aim to recruit 80,000 and 70,000 participants respectively, including fetuses and their parents, siblings, grandparents, and extended family members. Additionally, the TMM-COM cohort study will recruit participants from 2013 to 2016 and follow them for at least five years while the TMM birth-recohort study will recruit participants from 2013 to 2017 and follow them for at least four years. Furthermore, the TMMO Child Health Study was initiated in November 2012 in Miyagi Prefecture as a cross. This article was authored by Shinichi Kuriyama. We are article.tv, links in the description below.