Japanese Government (National)

Top Three:
Legislative Branch
National Diet
House of Representatives
House of Councilors
Judge Impeachment Court
Judges Indictment Court
National Diet Library

Executive Branch
Cabinet
Cabinet Secretariat
Cabinet Legislation Bureau
National Personnel authority
Security Council of Japan

Judicial Branch
Supreme Court
High Courts (8)
District Courts (50)
Family Courts (50)

Under these three:

Ministries (10)

Ministry of Agriculture, Forests and Fisheries
Web: www.maff.go.jp

Ministry of Economy, Trade and Industry
Web: www.meti.go.jp

Ministry of Education, Science, Sports and Culture
Web: www.mext.go.jp

Ministry of Environment
Web: www.env.go.jp

Ministry of Finance
Web: www.mof.go.jp

Ministry of Foreign Affairs
Web: www.mofa.go.jp

Ministry of Health, Labour and Welfare
Web: www.mhlw.go.jp

Ministry of Justice
Web: www.moj.go.jp

Ministry of Land, Infrastructure and Transport
Web: www.mlit.go.jp

Ministry of Public Management, Home Affairs,Post and Telecommunications
Web: www.soumu.go.jp