Constitutional Democratic Party of Japan

The Constitutional Democratic Party of Japan (立憲民主党, Rikken-minshutō), frequently abbreviated to CDP, Rikkentō (立憲党), Ritsumintō (立民党) or Minshutō (民主党),[15] is a centre-left political party in Japan.[16] The party is led by Yukio Edano.

Constitutional Democratic Party of Japan
立憲民主党 or 立民党

Rikken-minshutō or Ritsumintō
LeaderYukio Edano
Secretary-GeneralTetsuro Fukuyama
Deputy LeaderAkira Nagatsuma
Founded2 October 2017 (2017-10-02)
Split fromDemocratic Party
Headquarters2-12-4 Fuji Building 3F, Hirakawa-chō,
Chiyoda-ku, Tokyo 102-0093, Japan
Grassroots democracy[3]

Political positionCentre-left[6][7][8][9] to left-wing[10][11]
Colors     Blue[12]
  • Mattō na seiji[13]
    (lit. "Decent politics")
  • Reiwa democracy[14]
33 / 245
59 / 465
Local (Prefectural and Local) assembly members
703 / 32,448


The party was formed from a centre-left split from the opposition Democratic Party (DP) in the run up to the 2017 general election.[6][16][17] Prior to the election on 28 September 2017, the DP House of Representatives caucus dissolved in order for party members to stand as candidates for Tokyo governor Yuriko Koike's Party of Hope or as independents in the upcoming election.[18] The new party was launched on 2 October by DP deputy leader Yukio Edano at a press conference in Tokyo for liberals and left-leaning members of the DP who do not wish to, or were rejected for, contesting the election as candidates for the Party of Hope.[19][20]

On 3 October 2017 it was announced that the new party would not contest seats where former Democrats were running as Party of Hope candidates,[21] a gesture which was not returned when the Party of Hope ran a candidate in Edano's incumbent district. The Japanese Communist Party, in turn, pulled their own candidate from running in Edano's district so as to not take away votes from him.[22] The party won a total of 55 seats,[16] becoming the leading opposition party and leading the pacifist bloc (including the JCP and Social Democratic Party) to become the largest opposition bloc.


The party opposes the proposed revision of Article 9 of Japan's postwar constitution.[16][23][24] The party supports the phasing out of nuclear energy in Japan,[25] and government investment in renewable energy,[26] and supports the freeze in the rise of consumption tax.[27][28] The party does not support the legalization and maintenance of casinos.[29] The party also supports "building a society that supports each other and makes full use of individuality and creativity."[30][31]


Leader Yukio Edano
Deputy leader
Policy Affairs Research Council chief
Akira Nagatsuma
Vice leader
Election Campaign Committee chief
Shōichi Kondō
Vice leader
General Affairs Committee chief
Takahiro Sasaki
Vice leader
Councillors caucus chief secretary
Councillors caucus leader
Tetsurō Fukuyama
Deputy Secretary-General Yukihiko Akutsu
Policy Affairs Research Council deputy chief Seiji Ōsaka
Chinami Nishimura
Policy Affairs Research Council first vice chief Yōichirō Aoyagi
Diet Affairs Committee chief Kiyomi Tsujimoto
Diet Affairs Committee deputy chief Kōichi Yamauchi
Diet Affairs Committee first vice chief Yoshio Tezuka
Councillors Affairs Committee chief Masayoshi Nataniya
Board of Governors chief Hiroshi Kawauchi
Joint House General Council chief Satoshi Arai
Parliamentary Association chief Katsuhiko Yokomitsu


No. Name Term of office
Took Office Left Office
Split from: Democratic Party (2016) (centre-left)
1 Yukio Edano 2 October 2017 Incumbent

Election results

2017 General election results

Election Leader Candidates Seats won Constituency votes Constituency vote percentage PR Block votes PR Block vote percentage Status
2017 Yukio Edano 78
55 / 465
4,852,097 8.75% 11,084,890 19.88% Opposition

2019 Councillors election results

Election Leader Seats Nationwide Prefecture Status
Total Won Votes % Votes %
2019 Yukio Edano
32 / 245
17 / 124
7,951,430 15.79 7,917,720 15.81 Opposition

See also


  1. "機関紙「立憲民主」のご案内" [Information of the newspaper "Rikken-minshu"]. (in Japanese). Retrieved 3 June 2019.
  2. "Edano's new liberal party to field more than 50 candidates in Lower House election". The Japan Times. 4 October 2017. Retrieved 10 October 2017.
  3. "立憲民主党 政策パンフレット" (PDF). 2017. Archived from the original (PDF) on 10 October 2017.
  4. "Edano to form Constitutional Democratic Party". NHK World. NHK. 2 October 2017. Archived from the original on 25 October 2017. Retrieved 10 October 2017.
  5. "立憲民主党 政策パンフレット" (PDF). 2017. Archived from the original (PDF) on 10 October 2017.
  6. "New centre-left party launched in Japan ahead of vote". Channel News Asia. 2 October 2017. Retrieved 22 October 2017.
  7. Sim, Walter (29 October 2017). "Yukio Edano stands up as the leader of Japan's biggest opposition". The Straits Times. Retrieved 21 October 2019.
  8. "Japan PM Shinzo Abe promises to handle North Korea threat". BBC News. 23 October 2017. Retrieved 21 October 2019.
  9. Sieg, Linda (26 August 2018). "Japanese PM Abe seen headed for extended term despite policy doubts". Reuters. Retrieved 21 October 2019.
  10. Robin Harding (2017-10-18). "Leftwingers push Koike into third place in Japan election". Financial Times. Nikkei, Inc. Retrieved 2019-09-02. A Japanese leftwing party founded 17 days ago is poised to beat Yuriko Koike into third place in Sunday's general election, as the Tokyo governor suffers a dramatic reversal of fortune.
  11. James Griffiths and Emiko Jozuka (2019-07-18). "Japan election Surge of women candidates could reshape male-dominated parliament". CNN. Retrieved 2019-09-02. That’s because many of the female candidates are members of smaller, left-wing parties, the Constitutional Democratic Party (CDP) and the Japanese Communist Party (JCP).
  12. "日本に定着するか、政党のカラー" [Will the colors of political parties settle in Japan?] (in Japanese). Nikkei, Inc. 21 October 2017. Retrieved 23 September 2019. 立憲民主党は青だ。 [Constitutional Democratic Party is blue.]
  13. "立憲民主党 立憲民主党はあなたです。" [The Constitutional Democratic Party of Japan, CDP is you]. (in Japanese). Retrieved 3 June 2019.
  14. "立憲民主党 #令和デモクラシー" [The Constitutional Democratic Party of Japan, #Reiwa democracy]. (in Japanese). Retrieved 29 June 2019.
  15. 民主党 (Minshutō) was the original name of the Democratic Party. The CDP has reused that for their official abbreviated name.
  16. William D. Hoover, ed. (2018). Historical Dictionary of Postwar Japan. Rowman & Littlefield. p. 61. ISBN 978-1-5381-1156-7.
  17. "2017 Lower House Election / Edano announces launch of new party of liberals". The Yomiuri Shimbun. Archived from the original on 2017-10-02. Retrieved 2017-10-02.
  18. Yoshida, Reiji (28 September 2017). "Democratic Party effectively disbands, throwing support behind Koike's party for Lower House poll" via Japan Times Online.
  19. "Major opposition's liberal wing to form new group". Kyodo News. 2 October 2017. Retrieved 22 October 2017.
  20. "VOTE 2017: Edano plans to form new party as liberal force in election:The Asahi Shimbun".
  21. "Koike's party unveils 1st list of 192 candidates for upcoming election". Japan Today. 4 October 2017. Retrieved 4 October 2017.
  22. "Yukio Edano: Japan's opposition leader to watch". Nikkei Asian Review. October 22, 2017. Retrieved 4 October 2017.
  23. Yoshida, Reiji (16 October 2017). "Edano taking center stage as CDP gains momentum" via Japan Times Online.
  24. Sieg, Linda (17 October 2017). "Underdog centre-left party may outperform expectations in Japan snap poll". Reuters.
  25. "2017 Lower House Election / Parties debate whether, when to bring N-plants back online". The Yomiuri Shimbun. 17 October 2017. Archived from the original on 21 October 2017. Retrieved 18 October 2017.
  26. "It's not enough for political parties to merely tout economic catchwords". The Yomiuri Shimbun. 18 October 2017. Archived from the original on 19 October 2017. Retrieved 18 October 2017.
  27. "Edano's new party may outperform expectations in Sunday's election". Japan Today. 18 October 2017. Retrieved 18 October 2017.
  28. "2017 Lower House Election / Voters not impressed". The Economist. 19 October 2017. Retrieved 22 October 2017.
  29. 立憲民主党 基本政策, 2017-12-28
  30. 毎日新聞 (2017-10-07), 【ノーカット】党首討論会@日本記者クラブ, retrieved 2017-12-06
  31. "CDF Pamphlet" (PDF). Archived from the original (PDF) on 2017-10-08. Retrieved 2017-10-28. Cite journal requires |journal= (help)
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