Japan Innovation Party
Updated: 12/10/2025, 4:45:46 PM Wikipedia source
The Japan Innovation Party (日本維新の会, Nippon Ishin no Kai; Japan Restoration Association) is a conservative, centre-right to right-wing and populist political party in Japan. The party was as Initiatives from Osaka in October 2015 from a split in the old Japan Innovation Party. It became the third-biggest opposition party in the National Diet following the 2016 House of Councillors election. Since 2025, the party has been in a coalition agreement to provide confidence and supply to the governing Liberal Democratic Party (LDP). The Japan Innovation Party advocates decentralization, federalism (Dōshūsei), and limited government policies. Arguing to remove defense spending limits, and standing with the LDP on revising the constitution, the party gained conservative support during the 2021 general election, primarily in Osaka. The party has represented a form of right-wing populism that until 2025 opposed the LDP's entrenched control over Japanese politics and bureaucracy, known as the 1955 system.
Infobox
Abbreviation
IshinJIP
Leader
Hirofumi Yoshimura
Co-Leader
Fumitake Fujita
Secretary-General
Hiroshi Nakatsuka
Founders
Ichirō MatsuiTōru Hashimoto
Founded
2 November 2015 (2015-11-02)
Split from
Japan Innovation Party
Headquarters
Osaka, Osaka Prefecture, Japan
Newspaper
Nippon Ishin
Student wing
Ishin Students
Ideology
mw- Conservatism (Japanese)LibertarianismNeoliberalismEconomic liberalismPopulism
Political position
Centre-right to right-wing[A]
Regional affiliation
Osaka Restoration Association
Colours
mw- Lime green
Slogan
維新はやる。まっすぐに、改革をIshin wa yaru. Massuguni kaikaku o.('We'll do this. Innovation straight away.')
Councillors
19 / 248
Representatives
35 / 465
Prefectural assembly members
124 / 2,598
Municipal assembly members
766 / 32,430
National affiliation
LDP–JIP coalition (2025–)
Tables
· Leadership › Current leadership
Hirofumi Yoshimura
Hirofumi Yoshimura
Position
Leader
Name
Hirofumi Yoshimura
Fumitake Fujita
Fumitake Fujita
Position
Co-Leader and Parliamentary Leader
Name
Fumitake Fujita
Hiroshi Nakatsuka
Hiroshi Nakatsuka
Position
Secretary-General
Name
Hiroshi Nakatsuka
Alex Saito
Alex Saito
Position
Chairman of the Policy Research Council
Name
Alex Saito
Kaori Takagi
Kaori Takagi
Position
Chairman of the General Affairs Committee
Name
Kaori Takagi
Takashi Endo
Takashi Endo
Position
Chairman of the Diet Affairs Committee
Name
Takashi Endo
| Position | Name |
| Leader | Hirofumi Yoshimura |
| Co-Leader and Parliamentary Leader | Fumitake Fujita |
| Secretary-General | Hiroshi Nakatsuka |
| Chairman of the Policy Research Council | Alex Saito |
| Chairman of the General Affairs Committee | Kaori Takagi |
| Chairman of the Diet Affairs Committee | Takashi Endo |
| Chairman of the House of Councillors Caucus | Hitoshi Asada |
· Party leaders
Tōru Hashimoto
Tōru Hashimoto
Leaders
Tōru Hashimoto
Leaders
2 November 2015
Took office
12 December 2015
Ichirō Matsui
Ichirō Matsui
Leaders
Ichirō Matsui
Leaders
12 December 2015
Took office
23 August 2016
Ichirō Matsui
Ichirō Matsui
Leaders
Ichirō Matsui
Leaders
Toranosuke Katayama
Took office
23 August 2016
Left office
27 November 2021
Nobuyuki Baba
Nobuyuki Baba
Leaders
Nobuyuki Baba
Leaders
27 November 2021
Took office
27 August 2022
Nobuyuki Baba
Nobuyuki Baba
Leaders
Nobuyuki Baba
Leaders
27 August 2022
Took office
1 December 2024
Hirofumi Yoshimura
Hirofumi Yoshimura
Leaders
Hirofumi Yoshimura
Leaders
Seiji Maehara
Took office
1 December 2024
Left office
8 August 2025
Fumitake Fujita
Fumitake Fujita
Leaders
Fumitake Fujita
Leaders
8 August 2025
Took office
Incumbent
| Leaders | Took office | Left office | |
| Tōru Hashimoto | 2 November 2015 | 12 December 2015 | |
| Ichirō Matsui | 12 December 2015 | 23 August 2016 | |
| Ichirō Matsui | Toranosuke Katayama | 23 August 2016 | 27 November 2021 |
| Nobuyuki Baba | 27 November 2021 | 27 August 2022 | |
| Nobuyuki Baba | 27 August 2022 | 1 December 2024 | |
| Hirofumi Yoshimura | Seiji Maehara | 1 December 2024 | 8 August 2025 |
| Fumitake Fujita | 8 August 2025 | Incumbent | |
· Election results › House of Representatives
Votes
Votes
Election
Votes
Leader
%
Constituency
Seats
Constituency
+/-
Constituency
Votes
Constituency
%
Party list
Seats
Party list
+/-
Party list
Seats
Party list
+/-
2017
2017
Election
2017
Leader
Ichirō Matsui
Constituency
1,765,053
Constituency
3.18
Constituency
3 / 289
Constituency
new
Party list
3,387,097
Party list
6.07
Party list
8 / 176
Party list
new
Total
11 / 465
Total
new
Position
6th
Status
Opposition
2021
2021
Election
2021
Leader
4,802,793
Constituency
8.36
Constituency
16 / 289
Constituency
13
Constituency
8,050,830
Party list
14.0
Party list
25 / 176
Party list
17
Party list
41 / 465
Total
30
Total
3rd
Position
Opposition
2024
2024
Election
2024
Leader
Nobuyuki Baba
Constituency
6,048,104
Constituency
11.15
Constituency
23 / 289
Constituency
7
Party list
5,105,127
Party list
9.36
Party list
15 / 176
Party list
10
Total
38 / 465
Total
3
Position
3rd
Status
Opposition (until 2025)
Confidence and supply (since 2025)
Confidence and supply (since 2025)
Election
Confidence and supply (since 2025)
| Election | Leader | Constituency | Party list | Total | Position | Status | |||||||
| Votes | % | Seats | +/- | Votes | % | Seats | +/- | Seats | +/- | ||||
| 2017 | Ichirō Matsui | 1,765,053 | 3.18 | 3 / 289 | new | 3,387,097 | 6.07 | 8 / 176 | new | 11 / 465 | new | 6th | Opposition |
| 2021 | 4,802,793 | 8.36 | 16 / 289 | 13 | 8,050,830 | 14.0 | 25 / 176 | 17 | 41 / 465 | 30 | 3rd | Opposition | |
| 2024 | Nobuyuki Baba | 6,048,104 | 11.15 | 23 / 289 | 7 | 5,105,127 | 9.36 | 15 / 176 | 10 | 38 / 465 | 3 | 3rd | Opposition (until 2025) |
| Confidence and supply (since 2025) | |||||||||||||
· Election results › House of Councillors
Votes
Votes
Election
Votes
Leader
%
Constituency
Seats
Constituency
+/-
Constituency
Votes
Constituency
%
Party list
Seats
Party list
+/-
Party list
Won
Party list
+/-
Seats
Total
Seats
+/-
2016
2016
Election
2016
Leader
Ichirō MatsuiToranosuke Katayama
Constituency
3,303,419
Constituency
5.84
Constituency
3 / 73
Constituency
new
Party list
5,153,584
Party list
9.20
Party list
4 / 48
Party list
new
Seats
7 / 121
Seats
new
Seats
12 / 242
Seats
7
Position
5th
Status
Opposition
2019
2019
Election
2019
Leader
3,664,530
Constituency
7.28
Constituency
5 / 74
Constituency
new
Constituency
4,907,844
Party list
9.80
Party list
5 / 50
Party list
new
Party list
10 / 124
Seats
new
Seats
16 / 245
Seats
4
Seats
4th
Position
Opposition
2022
2022
Election
2022
Leader
Ichirō Matsui
Constituency
5,533,657
Constituency
10.41
Constituency
5 / 74
Constituency
2
Party list
7,845,985
Party list
14.79
Party list
8 / 50
Party list
4
Seats
12 / 125
Seats
5
Seats
21 / 248
Seats
5
Position
4th
Status
Opposition
2025
2025
Election
2025
Leader
Hirofumi YoshimuraSeiji Maehara
Constituency
3,451,834
Constituency
5.84
Constituency
3 / 74
Constituency
2
Party list
4,375,927
Party list
7.39
Party list
4 / 50
Party list
1
Seats
7 / 125
Seats
3
Seats
19 / 248
Seats
2
Position
5th
Status
Opposition (until 2025)
Confidence and supply (since 2025)
Confidence and supply (since 2025)
Election
Confidence and supply (since 2025)
| Election | Leader | Constituency | Party list | Seats | Position | Status | |||||||||
| Votes | % | Seats | +/- | Votes | % | Seats | +/- | Won | +/- | Total | +/- | ||||
| 2016 | Ichirō MatsuiToranosuke Katayama | 3,303,419 | 5.84 | 3 / 73 | new | 5,153,584 | 9.20 | 4 / 48 | new | 7 / 121 | new | 12 / 242 | 7 | 5th | Opposition |
| 2019 | 3,664,530 | 7.28 | 5 / 74 | new | 4,907,844 | 9.80 | 5 / 50 | new | 10 / 124 | new | 16 / 245 | 4 | 4th | Opposition | |
| 2022 | Ichirō Matsui | 5,533,657 | 10.41 | 5 / 74 | 2 | 7,845,985 | 14.79 | 8 / 50 | 4 | 12 / 125 | 5 | 21 / 248 | 5 | 4th | Opposition |
| 2025 | Hirofumi YoshimuraSeiji Maehara | 3,451,834 | 5.84 | 3 / 74 | 2 | 4,375,927 | 7.39 | 4 / 50 | 1 | 7 / 125 | 3 | 19 / 248 | 2 | 5th | Opposition (until 2025) |
| Confidence and supply (since 2025) | |||||||||||||||
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