The Diet is the legislative branch of the Japanese government.  The Diet consists of two chambers: the House of Representatives (Shugiin / 衆議院), or lower house, and the House of Councillors (Sangiin / 参議院), or upper house.  All Diet members are selected in popular elections.

House of Councillors (Sangiin) / 参議院

House of Councillors Internet Deliberation Relay / 参議院インターネット審議中継

House of Representatives (Shugiin) / 衆議院

House of Representatives Online / 衆議院審議中継

Research Navi, National Diet Library (Research on the Diet & Governments)  

The list of political parties whose members have seats in the Diet.

Constitutional Democratic Party of Japan/　立憲民主党

Democratic Party For the People/ 国民民主党

Japanese Communist Party / 日本共産党

Japan Innovation Party / 日本維新の会

Komeito / 公明党

Liberal Democratic Party of Japan (LDP) / 自由民主党

Party of Hope / 希望の党

Social Democratic Party (Shaminto) / 社民党  

Cabinet Office
- Japanese Economy and Public Finance 
- Nuclear energy 
- Children and Young People
- Gender Equality 
Japan Fair Trade Commission 
Ministry of Agriculture, Forestry and Fisheries 
Ministry of Defense 
Ministry of Economy, Trade and Industry 
Ministry of Education, Culture, Sports, Science and Technology 
Ministry of Foreign Affairs - Diplomatic Bluebook 
Ministry of Foreign Affairs - Official Development Assistance 
Ministry of Health, Labor and Welfare 
Ministry of Internal Affairs and Communications White Paper on Local Public Finance is located at the middle of the website. 
Ministry of Justice 
Ministry of Land, Infrastructure, Transport and Tourism
Annual Report on the Environment, the Sound Material-Cycle Society and Biodiversity in Japan, Ministry of the Environment 
National Police Agency under Overview of Japanese Police.  
White Paper on the World Economy (Japanese).