Abstract
Infrastructures such as water and gas supply systems, electric power and communication
systems, highways and railways are important utilities and transportation systems for our lives.
Firstly, the earthquake damage to infrastructures after the 2011 Great East Japan Earthquake is focused on and summarized with the casualty and the building damage. The earthquakes of which damage is described here are the 2011 Off the Pacific Coast of Tohoku earthquake, the 2016 Kumamoto earthquake, the 2018 Osaka-Fu Hokubu earthquake and the 2018 Hokkaido Eastern Iburi earthquake. In Japan, since both inter- and intra-plate earthquakes can take place at anytime and anywhere, we need to consider countermeasures for disaster reduction from every aspect. For the Nankai Trough Mega Earthquake, lessons learnt from the Great East Japan
Earthquake become very useful materials to mitigate the future earthquake disaster. Based on these resources and recent advanced knowledge obtained, the issues to be considered are picked up and the problems to be solved are discussed.
