Japan is under extremely severe conditions in terms of topography, geology and weather. Every year, flood damage occurs all over the country. Moreover, financial resources are getting limited alongside a changing social situation (declining birthrates and the aging population). Even in such a situation, it is necessary to steadily and effectively develop rivers to secure safety and security.

“The Law for Partial Revision of Flood Prevention Law” came into effect on June 19, 2017, following the occurrence of a large number of deaths due to the escape delays and enormous economic loses in recent large floods. The law encourages the position to a flood that cannot be prevented entirely by facilities will certainly occur. Therefore, it is essential to urgently rebuild the water disaster prevention conscious society which prepare for structural/non-structural disaster measures together.

In recent years, due to the heat-island effect, there are increasing cases where short-term heavy rain occurs locally and urban areas suffer from flood damage. Many of these flood damages are not caused by broken embankment or water overflow (flood by river water). There are a lot of flood damage caused by overflowing of waterways and sewage in urban areas (flood by internal water). However, there is a limit for structural disaster measures maintenance in a lean budget, therefore realistic non-structural disaster measures such as evacuation and water resistance are demanded.

In the past, countermeasures have been taken centering on the improvement of infrastructure facilities like embankments to reduce the damage caused by natural disasters. From now on, based on the premise that people cannot be protected from disasters at such facilities may occur, non-structural disaster measures are promoted to reduce disasters, such as eliminating people who will be late for escape and minimizing economic damage when the disaster exceeds the facility capacity.

Rivers have changed greatly with the growth of the city, and the waterside has been a precious resource. There seems to be various issues and prospects depending on the community, such as regaining a place full of nature or utilizing as a crowded and relaxing space. We ensure in flexible consideration of these various needs and contribute to the revitalization of the waterside of the area.

River structures play an important role in maintaining the function of flood control/water utilization/environment. In recent years, the viewpoint of efficient maintenance/management of existing facilities and the securement of safety against large-scale earthquakes are the important issues. To these backgrounds, we design river structures considering “safety and security” and “coexisting harmoniously with nature”.

In the erosion control field, we provide total support from survey/planning related to erosion control business in general to facilities design. We cooperate with geological engineers/GIS and conduct wide surveying/planning/design from the basic survey based on the Sediment Disaster Prevention Law, erosion control basic plan and erosion control dam bank to slope failure prevention.

In recent years, disasters have become more serious every year, and the frequency of unexpected disasters also increases. We support restoration work promptly and accurately and engaged to respond to disaster restoration with the entire company working together, in order for people in the disaster area to regain social life as soon as possible.

In recent years, facilities deteriorate and also facilities that require maintenance and renewal are increasing every year, such as river, erosion control, coast and fishing ports. In the future, it is necessary to manage facilities systematically, to extend the life of facilities, and to aim for leveling of renewal costs and reduction of LCC. We develop facility repair design and better maintenance planning for maintenance/management of each facility.