Reiwa Shinsengumi (Japanese: れいわ新選組) is a progressive[6][7] and left-wing populist[8][9] political party in Japan founded by actor-turned-politician Taro Yamamoto in April 2019.

Notable party members include university professor Ayumi Yasutomi and former deputy representative of the North Korean abduction liaison Toru Hasuike.

The withdrawal came following pushback from local residents, who were hesitant to vote for Yamamoto, a "parachute candidate," over Yoshida, who had been active within the community for many years prior.

[25] Eder-Ramsauer and Matsutani describe Reiwa Shinsengumi as an eclectic left-wing populist party that blends emancipatory radical democratic politics with an openness to communitarian ideas whilst opposing neoliberalism.

[26] On the other hand, Axel Klein, who takes an ideational approach, writes that the party does not meet the criteria that define (left) populism.

[27] The party is variously described as being anti-austerity, anti-establishment,[9][28][29] and anti-nuclear power[30] as well as supporting animal welfare,[30] minority rights,[30][31] and economic interventionism.