Political Parties

• Government Parties:
• Liberal Democratic Party of Japan (LDP)
• Komeito: Now having a coalition with LDP

• Opposition Parties: 
• The Democratic Party
• The Constitutional Democrative Party of Japan (in Japanese)
• Party of Hope (in Japanese)
• Japan Innovation Party (in Japanese)
• Liberal Party
• Social Democratic Party (in Japanese)
• Japanese Communist Party

Regulatory Bodies

• The Ministry of Internal Affairs and Communications (MIC):  This ministry is in charge of communications regulations.
• MIC's top page for information and communications technology
• MIC's top page for radio use

• The Ministry of Economy, Trade and Industry: This ministry is in charge of information and communications technology policy.

• The Council for Regulatory Reform: This council established under the Cabinet Office is in charge of government-wise regulatory reform.

• IT Strategies Headquarters: This headquarters established under the Cabinet Secretariat is in charge of government-wise IT strategy.

Laws and Regulations

• Laws and regulations for communications in English: This site is under MIC.

• Japanese Law Translation: This site is administered by the Ministry of Justice.

Equipment Authorization Bodies

• Telecom Engineering Center (TELEC): The leading authorization institution for radio equipment. 
• List of all registered authorization bodies for radio equipment.

• Japan Approvals Institute for Telecommunications Equipment (JATE): The leading authorization institution for telecommunications equipment.
• List of all registered authorization bodies for telecommunications equipment. (written in Japanese)

Quasi-Government Bodies

• National Institute of Information and Communications Technology (NICT): Leading quasi-governmental R&D institute for ICT

• Association of Radio Industries and Businesses (ARIB): Standardization body for radio equipment 

Research Societies

• Information and Communication Policy Forum (ICPF) (in Japanese)

• The Institute of Electronics, Information and Communication engineers (IEICE)

• The Japan Society of Information and Communication Research (JSICR)

Major players in telecommunications service

• Nippon Telegraph and Telephone Corporation (NTT): NTT's holding company
• Nippon Telegraph and Telephone East Corporation (NTT-East): Local carrier serving in Eastern Japan
• Nippon Telegraph and Telephone West Corporation (NTT-West): Local carrier serving in Western Japan
• NTT Communications Corporation (NTT Communications): Long distance carrier
• NTT DoCoMo Inc. (NTT DoCoMo): Mobile carrier
• NTT Data Corporation (NTT Data):  IT system integration

• KDDI Corporation (KDDI):

• SoftBank