Tarō Asō in the context of "2009 Japanese general election"

Shigeru Ishiba (born 4 February 1957) is a Japanese politician who served as Prime Minister of Japan and President of the Liberal Democratic Party (LDP) from 2024 until his resignation in 2025. He has represented Tottori 1st in the House of Representatives since 1996. Before his premiership, he was the Minister of Defense from 2007 to 2008 and Minister of Agriculture, Forestry and Fisheries from 2008 to 2009, as well as secretary-general of the LDP from 2012 to 2014.

Born into the Ishiba political family in Tokyo, Ishiba graduated from Keio University in 1979. Prior entering politics after his father's death, Ishiba worked at a bank before being elected to the House of Representatives in the 1986 general election as a member of the LDP at the age of 29. As a Diet member, Ishiba specialized in agricultural policy and defense policy. He served as parliamentary vice minister of agriculture under the premiership of Kiichi Miyazawa, but left the LDP in 1993 to join the Japan Renewal Party. After transitioning through several parties and returning to the LDP in 1997, Ishiba held various prominent positions, including Director-General of the Defense Agency under the premiership of Junichiro Koizumi, Minister of Defense under the premiership of Yasuo Fukuda and Minister of Agriculture, Forestry and Fisheries under the premiership of Tarō Asō.

Nippon Kaigi (日本会議; lit. 'Japan Conference') is Japan's largest ultraconservative and ultranationalist far-right non-governmental organisation and lobbying group. It was established in 1997 and has approximately 38,000 to 40,000 members as of 2020.

The group has significant influence in Japanese politics. Many ministers and a few prime ministers are included as members, including Sanae Takaichi, Shigeru Ishiba, Tarō Asō, Shinzō Abe and Yoshihide Suga.

Naoto Kan (菅 直人, Kan Naoto; born 10 October 1946) is a Japanese former politician who served as Prime Minister of Japan and President of the Democratic Party of Japan (DPJ) from June 2010 to September 2011.

Kan was the first Prime Minister since the resignation of Junichiro Koizumi in 2006 to serve for more than one year, with his predecessors Yukio Hatoyama, Tarō Asō, Yasuo Fukuda, and Shinzo Abe either resigning prematurely or losing an election. On 26 August 2011, Kan announced his resignation. Yoshihiko Noda was elected as his successor.

Yasuo Fukuda (福田 康夫, Fukuda Yasuo; born 16 July 1936) is a Japanese politician who served as Prime Minister of Japan from 2007 to 2008. He was previously the longest-serving Chief Cabinet Secretary in Japanese history, serving in that role from 2000 to 2004 under Prime Ministers Yoshirō Mori and Junichiro Koizumi. His record was surpassed by Yoshihide Suga, who served almost twice as long.

Following the resignation of Prime Minister Shinzo Abe, Fukuda was elected as President of the Liberal Democratic Party and became prime minister in September 2007. Fukuda was the first son of a former Japanese Prime Minister (Takeo Fukuda) to also take up the post. On 1 September 2008, Fukuda announced his resignation as party leader, and was succeeded by Tarō Asō. Although Japan hosted the G8 summit meeting without mishap during Fukuda's time in office, he himself earned little or no credit from ordinary Japanese, and when he resigned, he became the first of the G8 leaders to leave office.

The deputy prime minister of Japan (副総理, Fuku-sōri) is a post given to a minister of state designated by the prime minister of Japan to temporarily perform his functions when he is unable to, or succeed him in his vacancy, in accordance with the Cabinet Law. The prime minister does not have to designate a successor, and as such the position is not always filled.

The position has been vacant since 4 October 2021, but the most recent, and longest serving, deputy prime minister was Taro Aso, who served as minister of Finance concurrently. The deputy prime minister only exercises the functions of prime minister until the National Diet selects a new prime minister.