The creation of countermeasures against a large-scale disaster is an important focus of research for the future. This article briefly introduces some Japanese research and development activities for disaster-related technologies, including those carried out by the National Institute of Information and Communications Technology (NICT). First, we discuss lessons learned from the Great East Japan Earthquake that occurred on March 11, 2011. We show that the preferred communication tool in a disaster situation depends on the time that has elapsed after the disaster. We then summarize several research projects for developing robust and dependable communication networks, including an information distribution platform, and outline the research projects of NICT's Resilient ICT Research Center as well.