Ministry of Posts and Telecommunications (Japan)

Ministry of Posts and Telecommunications
Agency overview
郵政省 Yūsei-shō
Formed	April 1, 1946 (1946-04-01)
Preceding agencies	Ministry of Communications Ministry of Posts Ministry of Telecommunications
Dissolved	January 5, 2001 (2001-01-05)
Superseding agency	Ministry of Internal Affairs and Communications
Jurisdiction	Japan
Headquarters	Chiyoda-ku, Tokyo, Japan
Parent agency	Government of Japan

Head Office, Chiyoda, Tokyo

The Ministry of Posts and Telecommunications (郵政省, Yūsei-shō) was one of the ministries in the Japanese government. Ministry was resulted as merger of Ministry of Posts (郵政省) and Ministry of Telecommunications (電気通信省) on 1 August 1982, which were superseding Ministry of Communications (逓信省, Teishin-shō) from 1 April 1946. In 2001, the ministry was merged with other ministries to form the Ministry of Internal Affairs and Communications.

Telecommunications

History	Beacon Broadcasting Cable TV Communications satellite Computer network Drums Electrical telegraph Fax Heliographs Hydraulic telegraph Internet Mass media Mobile phone Optical telecommunication Optical telegraphy Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Semaphore Smartphone Smoke signals Telecommunications history Telautograph Telegraphy Teleprinter (teletype) Telephone The Telephone Cases Television Timeline of communication technology Undersea telegraph line Videoconferencing Videophone Videotelephony

Pioneers	Edwin Howard Armstrong John Logie Baird Paul Baran Alexander Graham Bell Tim Berners-Lee Jagadish Chandra Bose Vint Cerf Claude Chappe Donald Davies Lee de Forest Philo Farnsworth Reginald Fessenden Elisha Gray Innocenzo Manzetti Guglielmo Marconi Antonio Meucci Alexander Stepanovich Popov Johann Philipp Reis Nikola Tesla Camille Tissot Alfred Vail Charles Wheatstone Vladimir K. Zworykin

Transmission media	Electromagnetic radiation Electrical cable Free-space optical communication Molecular communication Optical fiber

Network topology and switching	Links Nodes Terminal node Network switching (circuit packet) Telephone exchange

Multiplexing	Space-division Frequency-division Time-division Polarization-division Orbital angular-momentum Code-division

Networks	ARPANET BITNET Cellular network Computer CYCLADES Ethernet FidoNet Internet ISDN LAN Mobile NGN NPL network Public Switched Telephone Radio Telecommunications equipment Television Telex WAN Wireless World Wide Web

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