Shigeru Ishiba is a Japanese politician. Ishiba is a member of the Liberal Democratic Party (LDP), and is the leader of the Suigetsukai party faction, and a member of the Heisei Kenkyūkai faction, which was then led by Fukushiro Nukaga, until 2011.

Factions are an accepted part of the Liberal Democratic Party (LDP), the ruling party of Japan, which began with eight formal factions when it was first formed by merger in 1955. A political faction may be defined as a sub-group within a larger organization. While factions characterize other political parties in Pacific Asia, Japanese factionalism is distinguished by its stability and institutionalization. Although factions reconstitute themselves from time to time, the habatsu active today can be traced back to their 1955 roots, a testament to the stability and institutionalized nature of Liberal Democratic Party factions.