Seiwa Seisaku Kenkyūkai
Seiwa Seisaku Kenkyūkai (, lit. Seiwa Political Research Council), often shortened to Seiwakai is a major faction within Japan's Liberal Democratic Party (LDP). It was led by Shinzo Abe from 2021 until his assassination in 2022. Since Abe's death, it has had collective leadership. Seiwakai is currently the largest faction within the LDP. History 
The faction was established in 1979 by former prime minister Takeo Fukuda. The faction has its origins on a group formed by Fukuda to oppose prime minister Hayato Ikeda's economic policies. The faction was led by Shinzo Abe from 2021 until his assassination in 2022. Since Abe's death, it has had collective leadership. On 17 August 2023, the faction has agreed to introduce a collective leadership system, with Ryū Shionoya as its coordinator, while leaving the previous chairmanship post vacant. Political stance 
Seiwakai is referred to as a nationalist or national-conservative. It has been characterized as right-leaning, hawkish and favoring constitutional revision. Seiwakai faction heads
Faction heads who became prime minister are in bold. See also 
 Nippon Kaigi

References 

1979 establishments in Japan
Conservatism in Japan
Japanese nationalism
Liberal Democratic Party (Japan)
National conservatism
Political party factions in Japan
Shinzo Abe