Because of COVID-19, our life, including the use of an urban park, drastically changed while we spend time with stay-at-home style. This study aims to find the characteristics of urban park usage during the COVID-19 crisis. We conducted observational surveys in five parks for three months. We revealed how the park use changed due to the opening of playground equipment following the lifting of the state of emergency. We found the demand for the park increased under the state of emergency and the difference in children’s park use between the situation in the emergency state and that in usual. We should reconsider the management of park during the state of emergency based on research.