Contrary to the generally high level of productivity in Japanese industry, the productivity of construction labor is low compared to other countries. The work force is aging due to a lack of interest by younger workers in entering the industry as well as Westernization of the young, who are not prepared to follow the traditional seniority system to gain advancement. The Japanese construction industry labor force follows the general cultural attitude towards the lifetime employment system of which the essence is recruitment of new graduates each year, training them, and assuring continuous employment until retirement, although this system in changing currently (SD-37, p. 16).