After the world war II, the needs of applied earth sciences such as engineering geology, hydrogeology, applied geomorphology etc. has been emphasized in Japan. It is mainly due to the requests of engineers who constructed high ways, railway roads, tunnels, bridges, high buildings and deep wells of large diameters. It is partly due to the requests of agricultural engineers who did reclamation works of large scale. These necessities stimulated to the developement of applied earth sciences.
It is easily imagined that applied earth sciences are closely connected to the study of Quaternary research in Japan. For example, one aspect of engineering geology related to soil mechanics will not be formed without standing on the basis of sound study of Quaternary geology.
The writer demonstrated some of the Quaternary researches in Japan contributed to the applied earth sciences and wishes active collaboration of Quaternary research with applied earth sciences.
