The Ministry of Public Management, Home Affairs, Posts and Telecommunications was created by the integration of the Management and Coordination Agency, the Ministry of Home Affairs, and the Ministry of Posts and Telecommunications, following the reorganization of central government ministries and agencies in January 2001.

The Management and Coordination Agency was established in 1984 by partially restructuring the jurisdictions of the Prime Minister's Office and the Administrative Management Agency, which was established in 1948 with the consolidation of the Administration and Survey Department and the Central Administration Inspection Commission.
The Ministry of Home Affairs originated in the Local Finance Commission established in 1948 following the disintegration of the Ministry of the Interior. The Ministry of Home Affairs was established in 1960 and had been promoting the decentralization.

The forerunner of the Ministry of Posts and Telecommunications is the Ministry of Postal Services and Communications established in 1885.

The Ministry changed its name to Ministry of Transport and Communications during World War II, but restored its former name of Ministry of Postal Services and Communications in 1946 and then the Ministry of Posts and Telecommunications was established in 1949. In recent years, the Ministry had put forth efforts not only in the field of postal services, but also in the field of public administration concerning telecommunications, as demonstrated by the new establishment of the Telecommunications Policy Bureau.

The Ministry of Public Management, Home Affairs, Posts and Telecommunications handles the administrative work of administrative management, local autonomy, information-communications and postal services, as its pillars.