Sources: Mainichi
Sanae Takaichi defeats Shinjiro Koizumi in a runoff election to become the next president of the Liberal Democratic Party (LDP) and prime minister-designate. She is the first female leader of the LDP and, should she be confirmed by the Diet, the first female prime minister of Japan. 2025-10-4
Japanese citizens vote for 125 of the 248 members of the House of Councillors, the upper house of the National Diet. 2025-07-20
A report to the Japanese National Diet revealed that from the end of World War II to 1996 over 25,000 Japanese citizens were forcibly sterilized under their eugenics law, including two nine-year-olds. 2023-06-19
The National Diet of Japan ratifies a United States–Japan trade deal. Under the deal, Japan will reduce its tariffs on U.S. beef and pork; in return, Japan will receive reductions in tariffs on certain manufactured goods. 2019-12-4
The Japanese Diet passes an anti-terrorism law that has been accused by critics as a threat to freedom. 2017-06-15
The National Diet of Japan passes legislation allowing Emperor Akihito to abdicate. The abdication is to take place within three years. 2017-06-9
Thousands protest outside the Japanese parliament in Tokyo against the relocation of a U.S. military base on Okinawa Island. Residents cite noise, pollution, and crime as reasons for not wanting a new base built. 2016-02-21
Japan's upper chamber of Parliament approves controversial legislation, which the lower chamber passed in July, that expands the role of the Japanese Self-Defense Forces overseas. 2015-09-19
Fist-fights erupt between legislators in the National Diet of Japan over a security bill that would allow Japan Self-Defense Forces to fight abroad. Japan had previously sent only a small amount of troops to Iraq. 2015-09-17
Jordan signs a nuclear co-operation treaty with Japan to build a nuclear power plant within 10 years. 2010-09-11