The possibility of a huge earthquake affecting Tokyo in the future is high. In the event of such an earthquake, many people will face problems returning to their homes, causing complete disorder and confusion as it will be impossible for everyone to access emergency shelters. If buildings such as high-rise condominiums remain standing and safe, it will be desirable that their residents take refuge at home. In this study, we investigated the awareness of disaster mitigation needs using an internet survey of over 800 residents of high-rise condominiums (of 10 or more stories) in central Tokyo. Our results show that approximately 60% of residents would take refuge at home. However, almost none of the respondents had emergency supplies such as water, food, and other daily necessities. This lack of preparedness would result in many people needing to move to emergency shelters. By analyzing these results, we aim to develop a method for avoiding confusion in the aftermath of a disaster and educate building residents on their needs in a disaster situation and the preparatory actions they must take.