The E-J Holdings Group is determined to work on strategic projects based on its fundamental principle of becoming “a leading infrastructure solution consultancy firm in Japan” with its core competencies in three fields, i.e. “environment”, “disaster prevention and conservation” and “assistance for administration”. It has identified “the mitigation of natural disaster risks” as one of the five priority fields and has been engaged in wide-ranging businesses for the prevention and mitigation of damages caused by earthquakes, flooding and sediment disasters.
In accordance with this principle, the EJ Research Center for Disaster Risk Mitigation was established on June 1, 2015 for the purpose of contributing to the development of infrastructure, which ensures the people of Japan and the world “safe lives with peace of mind” through its “contribution to the creation of a safe and assured national land”, “contribution to urban development and local self-reliance and vitalization” and “the planning of disaster mitigation measures by means of adapting to a low carbon society, recycling society and a harmonious society with nature”.

Research Groups

Earthquake Disaster Prevention

While being exposed to the threat of such major earthquake disasters as the Nankai megathrust earthquake and Tokyo metropolitan earthquake, almost every year, Japan experiences an earthquake or more with an intensity of over 5 somewhere in the country. In the context of such an earthquake-prone environment, there is a limit to physical measures to mitigate damage, making the adoption of such intangible measures to deal with earthquake damage as the mitigation of secondary damage leading to early reconstruction, etc. essential.
The Center has been involved in wide-ranging aspects of earthquake damage prevention, such as the evaluation of seismic motion, estimation of earthquake damage and assistance for the formulation of disaster prevention plans, and has conducted many studies on major earthquake damage in Japan and characteristic earthquake damage abroad.
The Center will engage in technological development for effective earthquake damage prevention while making the best use of the potential presented by its research activities. For this purpose, the Center will expand its cooperation with national research institutions, academic societies and universities while actively utilizing IoT technologies.

Water Disaster Prevention (Coasts, Ports and Harbours)

Since the Great East Japan Earthquake, active efforts have been made to prevent or mitigate tsunami damage.
However, there are still many practical issues to be dealt with in regard to the impacts of tsunami on structures and disaster mitigation effect of certain facilities.
Japan is actually exposed to various coastal disasters, including high tides and winter wind waves, in addition to tsunami.
The Center aims at preventing or mitigating coastal disasters through advanced cooperative research with universities, including efforts to develop an advanced analytical technology for wave deformation and the development of a post system to utilize the analysis results in many areas.

Sediment and Volcanic Disaster Prevention

A sediment disaster caused by an earthquake or downpour can inflict enormous damage. Meanwhile, many issues must be solved to enable the prediction of the location and size of a possible sediment disaster. As the mechanism of a sediment disaster associated with an earthquake is not fully understood, the prediction of such a disaster is difficult. Moreover, once such a disaster occurs, sediment disaster sites pose serious obstacles to post-earthquake rehabilitation and reconstruction efforts.
The Center aims at the effective and accurate mitigation of sediment disaster damage to contribute to the development of a sense of safety and pace of mind of local communities through the R & D of advanced sediment disaster prediction technologies, making the best use of its sediment disaster-related experience and knowledge nurtured over many years.