[6] The faction has its origins on a group formed by Fukuda to oppose prime minister Hayato Ikeda's economic policies.

[9] 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.

[10] In December 2023, news about a slush fund scandal involving several Seiwakai ministers and party bosses, including Yasutoshi Nishimura and Kōichi Hagiuda, leaked.

According to initial public allegations, dozens of members of the Diet from the Seiwakai were suspected of collecting at least ¥100 million from fundraising and storing the money in slush funds, in violating of Japanese campaign finance and election law.

[12] The National Police Agency raided the Seiwakai headquarters later in the month.