We have performed a comprehensive study about urban environment and health of children in East Asia. We investigated various measurement items, for example, local cold tolerance and questionnaire about a lifestyle in five cities of East Asia. The database was made based on these findings. In this report, we describe the result that compared Japan with other cities in East Asia. We investigated the actual situation of a lifestyle in these cities. Furthermore we analyzed those results. It was shown that a life time of Japanese children became noct una, and the amount of physical activities of children was reduced as they grew.
