Kiichi Miyazawa in the context of "Noboru Takeshita"

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.

Kōchikai (宏池会; "Broad Pond Society") was a leading faction within Japan's Liberal Democratic Party (LDP), founded by bureaucrat-turned-politician Hayato Ikeda in 1957. The faction has produced five prime ministers (Ikeda, Masayoshi Ōhira, Zenkō Suzuki, Kiichi Miyazawa, and Fumio Kishida), two LDP presidents (Yōhei Kōno and Sadakazu Tanigaki), and a large number of cabinet officeholders. The faction was officially dissolved on January 23, 2024 after Prime Minister Fumio Kishida pledged to dissolve the faction in the aftermath of a political funds scandal. However, former faction members still meet frequently as a group, exchange information, and collectively exert pressure on other politicians.