Constitutional Democratic Party of Japan
|Deputy Leader||Akira Nagatsuma|
|Founded||2 October 2017|
|Split from||Democratic Party|
|Headquarters||2-12-4 Fuji Building 3F, Hirakawa-chō, Chiyoda-ku, Tokyo 102-0093, Japan|
|Slogan||Mattō na seiji|
(lit. "Decent politics")
28 / 242
68 / 465
|Local (Prefectural and Local) assembly members|
668 / 32,448
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), is a centre-left political party in Japan. The party is led by Yukio Edano.
The party was formed from a centre-left split from the opposition Democratic Party (DP) in the run up to the 2017 general election. 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. 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.
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, 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. The party won a total of 55 seats, 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. The party supports the phasing out of nuclear energy in Japan, and government investment in renewable energy, and supports the freeze in the rise of consumption tax. The party does not support the legalization and maintenance of casinos. The party also supports "building a society that supports each other and makes full use of individuality and creativity." 
Policy Affairs Research Council chief
Election Campaign Committee chief
General Affairs Committee chief
Councillors caucus chief secretary
Councillors caucus leader
|Deputy Secretary-General||Yukihiko Akutsu|
|Policy Affairs Research Council deputy chief||Seiji Ōsaka|
|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|
General election results
|Election||Leader||# of candidates||# of seats won||# of Constituency votes||% of Constituency vote||# of PR Block votes||% of PR Block vote||Government/opposition|
55 / 465
- "機関紙「立憲民主」のご案内" [Information of the newspaper "Rikken-minshu"]. cdp-japan.jp (in Japanese). Retrieved 3 June 2019.
- "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.
- "立憲民主党 政策パンフレット" (PDF). 2017. Archived from the original (PDF) on 10 October 2017.
- "Edano to form Constitutional Democratic Party". NHK World. NHK. 2 October 2017. Retrieved 10 October 2017.
- "New centre-left party launched in Japan ahead of vote". Channel News Asia. 2 October 2017. Retrieved 22 October 2017.
- "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]. cdp-japan.jp (in Japanese). Retrieved 3 June 2019.
- 民主党 (Minshutō) was the original name of the Democratic Party. The CDP has reused that for their official abbreviated name. https://twitter.com/CDP2017/status/914780938814525441
- William D. Hoover, ed. (2018). Historical Dictionary of Postwar Japan. Rowman & Littlefield. p. 61. ISBN 978-1-5381-1156-7.
- "2017 Lower House Election / Edano announces launch of new party of liberals". The Yomiuri Shimbun.
- Yoshida, Reiji (28 September 2017). "Democratic Party effectively disbands, throwing support behind Koike's party for Lower House poll" – via Japan Times Online.
- "Major opposition's liberal wing to form new group". Kyodo News. 2 October 2017. Retrieved 22 October 2017.
- "VOTE 2017: Edano plans to form new party as liberal force in election：The Asahi Shimbun".
- "Koike's party unveils 1st list of 192 candidates for upcoming election". Japan Today. 4 October 2017. Retrieved 4 October 2017.
- "Yukio Edano: Japan's opposition leader to watch". Nikkei Asian Review. October 22, 2017. Retrieved 4 October 2017.
- Yoshida, Reiji (16 October 2017). "Edano taking center stage as CDP gains momentum" – via Japan Times Online.
- Sieg, Linda (17 October 2017). "Underdog centre-left party may outperform expectations in Japan snap poll". Reuters.
- "2017 Lower House Election / Parties debate whether, when to bring N-plants back online". The Yomiuri Shimbun. 17 October 2017. Retrieved 18 October 2017.
- "It's not enough for political parties to merely tout economic catchwords". The Yomiuri Shimbun. 18 October 2017.
- "Edano's new party may outperform expectations in Sunday's election". Japan Today. 18 October 2017. Retrieved 18 October 2017.
- "2017 Lower House Election / Voters not impressed". The Economist. 19 October 2017. Retrieved 22 October 2017.
- 立憲民主党 基本政策, 2017-12-28
- 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
- "CDF Pamphlet" (PDF).