To illustrate the features of the post-war development of a large-scale forest business and its economic characteristics, this paper focuses on the relationships between technical developments in the management of man-made forests and forestry labor. It uses Hayami Forestry of Miyama-cho, Mie prefecture as a case study. Hayami Forestry, in the course of post-war development and while coping with the changes in the timber market, has continued establishing man-made forests, created a system of comprehensive forest management, and developed new employment conditions. Based upon developments in the production of good quality timber and the relative advantage of Japanese cypress prices in the timber market, the trend of long-rotation management began in the 1970's. In the 1990's, with the establishment of new labor and employment conditions, there were increased levels of employment of new young labors and at the same time, the mechanization of forestry entered a new phase.