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Reiwa Shinsengumi

Updated: 12/10/2025, 8:57:50 PM Wikipedia source

Reiwa Shinsengumi (れいわ新選組) is a progressive and left-wing populist political party in Japan founded by actor-turned-politician Taro Yamamoto in April 2019. The party was formed by left-wing members of the Liberal Party who opposed its merger with the Democratic Party for the People. The party won more than 4% of the vote after contesting the House of Councilors election in July 2019, gaining two seats only about three and a half months after the formation of the party. The party is named after the current era name Reiwa and the Shinsengumi of the Bakumatsu period.

Infobox

Secretary-General
Takashi Takai
Co-leaders
Taro YamamotoAkiko OishiMari Kushibuchi
Founder
Taro Yamamoto
Founded
1 April 2019 (2019-04-01)
Split from
Liberal Party
Headquarters
1F, Akasaka-Kōei Bldg. 3-2-6 Akasaka, Minato-ku, Tokyo
Ideology
ProgressivismLeft-wing populism
Political position
Left-wing
Colors
mw- Pink
Slogan
「日本を守る」とは、「あなたを守る」ことから始まるNihon wo mamoru to wa anata wo mamoru kotokara hajimaru("Protecting Japan starts with protecting you")
Councillors
6 / 248
Representatives
9 / 465
Prefectural assembly members
0 / 2,644
Municipal assembly members
54 / 29,135

Tables

· Leader
Left office
Left office
No.
Took office
Name(Birth–death)
Left office
Taro Yamamoto(b. 1974)
Taro Yamamoto(b. 1974)
No.
1
Name(Birth–death)
Taro Yamamoto(b. 1974)
Constituency / title
Cou for Tokyo(21 July 2013 – 21 July 2019; 25 July 2022 – present)Rep for Tokyo PR block(31 October 2021 – 15 April 2022)
Term of office
1 April 2019
Term of office
Incumbent
Election results
2019 Unopposed2022 Taro Yamamoto – 8.83Mari Kushibuchi and Akiko Oishi – 4.36Tsunehira Furuya – 3.81
No.
Name(Birth–death)
Constituency / title
Term of office
Election results
Image
Took office
Left office
Split from: a part of Liberal Party (2016) (centre-left)
1
Taro Yamamoto(b. 1974)
Cou for Tokyo(21 July 2013 – 21 July 2019; 25 July 2022 – present)Rep for Tokyo PR block(31 October 2021 – 15 April 2022)
1 April 2019
Incumbent
2019 Unopposed2022 Taro Yamamoto – 8.83Mari Kushibuchi and Akiko Oishi – 4.36Tsunehira Furuya – 3.81
· Election results › House of Representatives
No.
No.
Election
No.
Leader
±
Candidates
Share
Seats
Number
Seats
%
Seats
Number
Position
%
2021
2021
Election
2021
Leader
Taro Yamamoto
Candidates
21
Seats
3 / 465
Seats
new
Seats
0.6%
Position
7th
Constituency votes
248,280
Constituency votes
0.43%
PR Block votes
2,215,648
PR Block votes
3.86%
Government
Opposition
2024
2024
Election
2024
Leader
35
Candidates
9 / 465
Seats
6
Seats
1.9%
Seats
6th
Position
425,445
Constituency votes
0.78%
Constituency votes
3,805,060
PR Block votes
6.98%
PR Block votes
Opposition
Election
Leader
Candidates
Seats
Position
Constituency votes
PR Block votes
Government
No.
±
Share
Number
%
Number
%
2021
Taro Yamamoto
21
3 / 465
new
0.6%
7th
248,280
0.43%
2,215,648
3.86%
Opposition
2024
35
9 / 465
6
1.9%
6th
425,445
0.78%
3,805,060
6.98%
Opposition
· Election results › House of Councillors
Total
Total
Election
Total
Leader
Won
Candidates
Votes
Seats
%
Seats
Votes
Nationwide
%
2019
2019
Election
2019
Leader
Taro Yamamoto
Candidates
10
Seats
2 / 245
Seats
2 / 124
Nationwide
2,280,252
Nationwide
4.6
Prefecture
214,438
Prefecture
0.4
Status
Opposition
2022
2022
Election
2022
Leader
14
Candidates
5 / 248
Seats
3 / 125
Seats
2,319,157
Nationwide
4.4
Nationwide
989,716
Prefecture
1.9
Prefecture
Opposition
2025
2025
Election
2025
Leader
24
Candidates
6 / 248
Seats
3 / 125
Seats
3,879,914
Nationwide
6.6
Nationwide
1,881,606
Prefecture
3.2
Prefecture
Opposition
Election
Leader
Candidates
Seats
Nationwide
Prefecture
Status
Total
Won
Votes
%
Votes
%
2019
Taro Yamamoto
10
2 / 245
2 / 124
2,280,252
4.6
214,438
0.4
Opposition
2022
14
5 / 248
3 / 125
2,319,157
4.4
989,716
1.9
Opposition
2025
24
6 / 248
3 / 125
3,879,914
6.6
1,881,606
3.2
Opposition
· Election results › Tokyo gubernatorial
2020
2020
Election
2020
Candidate
Taro Yamamoto
Votes
657,277
%
10.72
Finishing place
3rd
Result
Lost
Election
Candidate
Votes
%
Finishing place
Result
2020
Taro Yamamoto
657,277
10.72
3rd
Lost
· Election results › Tokyo prefectural
2021
2021
Election
2021
Leader
Taro Yamamoto
Votes
37,299
%
0.80
Seats
0 / 127
2025
2025
Election
2025
Leader
46,743
Votes
0.88
%
0 / 127
Election
Leader
Votes
%
Seats
2021
Taro Yamamoto
37,299
0.80
0 / 127
2025
46,743
0.88
0 / 127

References

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