In this study, based on the results of a survey on the life conditions of high school students, we analyzed the relationship between changes in life, various aspects of mental health, and life conditions, due to the after reopening of schools. The following three points were clarified. (1) A strong relationship was observed between an increase in students' willingness to go to school, an increase or decrease in the ease of consulting with teachers, an increase or decrease in the amount of time spent talking with friends, and an increase or decrease in the feeling of having fun. (2) It was shown that there is a relationship between increased motivation to go to school and good sleep, home learning and home environment, and whether or not to skip breakfast, confirming the importance of establishing lifestyle in the COVID-19. (3) Students who were more motivated to go to school had lower levels of sleep disturbance, Internet dependence, and SDQ, and higher SDQ and QOL. From the above, in order to increase students' willingness to go to school and maintain and improve their mental health, it is hoped that the establishment of lifestyle and the enhancement of counseling services by specialists will be established.
