This paper is the third part of the historical study on the houses for employees of Japanese National Railways (JNR). In this paper, especially, the history about the employees' houses from 1906 to 1916 is clarified. The result can be summarized as follows :
1.JNR's first standardization of the houses for employees was enacted in 1916. That is able to understand as is inevitable result of the establishment of "Railway Nationalization Act" (1906) and the reorganization of the organization following that law.
2.In that standardization of the houses, the floor plannings of 26 divided into 8 grades were defined. And when those floor plannings are analyzed from a viewpoint of a grade, the undividable and precise relation between a job grade and a floor planning of houses is clarified.
3.On the other hand, two or more types of floor planning were defined in the same grade in that standardization. That is able to be understood as characteristics against houses for government employees who work in other government offices. However, when the differences in each floor planning in the same grade are analyzed, it is clarified that the meanings of those differences are not necessarily clear.
4.As a result, JNR's first standardization of the houses for employees is regarded as the early stage to completion of that.