A Plurality Atlas

Timeline of Plurality and digital democracy in Japan

In 2023, an event championing Plurality, "Plurality Tokyo", was held in Tokyo. After the 2024 Tokyo governor's election, activity spread to the Tokyo Metropolitan Government's long-term strategy, an open-source tool called Kouchou AI, a Japanese edition of the book, and a new party entering parliament. This timeline follows those events in date order.

You may see phrases like "Tokyo analyzes residents' opinions with AI" or "digital democracy" in the news, but it is hard to tell when and where this started. In Japan, over the past few years, the same tools and ideas have spread step by step: from a small event, to an election, to the Tokyo Metropolitan Government, to cities and towns, and to the national parliament. This article lays out those events in date order.

How the book has been read and translated is covered in detail in the article on the Plurality movement in Japan. Use this one as an overall "map" that also includes elections, government and tools. Links to article titles in the tables lead to more detailed articles.

In short

In 2023, "Plurality Tokyo", an event championing the ideas of the book Plurality by Audrey Tang and E. Glen Weyl, was held in Tokyo [1]. In the summer of 2024, in the election for Governor of Tokyo, Takahiro Anno used broad listening (a way of hearing many voices with the help of AI), an idea that appears in the book, in his campaign [7].

From that point, activity spread to the drafting of the Tokyo Metropolitan Government's long-term strategy [24], an open-source tool (one whose inner workings anyone can see and use) called Kouchou AI [30], the publication of a Japanese edition in 2025 [32], and a new political party, Team Mirai, winning seats in parliament [38][42].

Timeline

2023 to early 2024: events and first experiments

Date Event
2023-04-12 Plurality Tokyo is held in Tokyo. Keynotes come from Tang and from Kevin Owocki, founder of Gitcoin (a crowdfunding platform that raises money for public goods), both as recorded videos, and Joi Ito speaks at the venue. The event ends with an unconference (a session where participants propose topics on the spot) that uses Polis (a tool that shows how opinions are distributed) [1][2]. → The Plurality movement in Japan
2023-12-02 Tang gives a talk at the event "Plurality Seoul" in Seoul and shows a discussion screen that uses AI to display opinions like constellations. According to Hirokazu Nishio's own notes, he was interested, asked about it, and learned of Talk to the City (a tool that uses AI to sort opinions and draw them as a chart) [3][4]
2024-01-03 At "Glen in Japan", an event of Plurality Tokyo, Hirokazu Nishio presents "Words as Public Goods" [5]
2024-05-20 Publication of the English edition is announced. It can be read free on the web, and printed copies can also be ordered [6]. → Plurality
2024-05-23 Through Nishio's introduction, Haruyuki Seki, Anno and Nishio meet. Seki introduces Talk to the City, and on May 30 Nishio tries it on about 20,000 AI-related public comments (public comment is a procedure in which a government presents a draft and widely invites opinions on it) [7]

Late 2024: the governor's election and the Tokyo Metropolitan Government

Date Event
2024-06-06 Takahiro Anno announces at Tokyo City Hall that he will run for governor. A full transcript of the press conference is published the next day [8]
2024-06-20 Anno publishes his manifesto (list of policies) and makes it possible for anyone to propose changes on GitHub (a website where documents can be revised together) [9]. → Takahiro Anno's 2024 Tokyo campaign
2024-07-07 Voting and counting in the governor's election. Anno receives 154,638 votes and finishes fifth [7][10]
2024-07-25 At "Funding the Commons Tokyo 2024" (held at the United Nations University [12]), Anno and Tang talk about broad listening in practice [11]. Nishio had also prepared "⿻Plurality in Japan", but through a miscommunication his presentation was skipped, and he announced on the spot that he would put it on YouTube. The recording is available on YouTube [12][13]
2024-07-26 A conversation with the two authors is held at the National Museum of Emerging Science and Innovation (Miraikan). Weyl later looks back on this as the most meaningful day of his professional life [14]
2024-09-30 Anno's campaign releases programs it built for the election (three of them, including the AI avatar "AI-Anno") [15]
2024-10-26 Anno's campaign announces that it helped Nippon TV's coverage of the House of Representatives election with broad listening [16]
2024-11-16 At Code for Japan Summit 2024, Tang and Anno give the keynote in the form of a panel that Haruyuki Seki also joins. The video is published on December 3 [17][18]
2024-11-22 The Tokyo Metropolitan Government begins inviting opinions on "Shin Tokyo 2050 (provisional name)" [19]. On the same day, Anno becomes an adviser to GovTech Tokyo (the organization in charge of digitalizing the metropolitan government) [20]. → Broad listening for Tokyo's 2050 strategy
2024-12-03 In a policy speech to the Tokyo Metropolitan Assembly, the governor says that broad listening should be brought into many areas of the metropolitan government, and that Shin Tokyo 2050 is the test case [21]
2024-12-16 The metropolitan government publishes interim results on 11,622 opinions and extends the call until December 20 [22]

2025: DD2030, the Japanese edition and Team Mirai

Date Event
2025-01-16 Anno announces the launch of "Digital Democracy 2030 (DD2030)". It is a project to build open-source tools and let local governments and political parties use them free of charge [23]
2025-01-31 The metropolitan government publishes the results of a broad listening analysis of 27,915 items of data, together with the draft "2050 Tokyo Strategy" [24][25]
2025-02-25 "Plurality Tokyo Namerakaigi" (held jointly with the 5th Namerakaigi). Ken Suzuki speaks on "Plurality and the Nameraka Society", Anno introduces DD2030, and Nishio speaks on "How can digital democracy be scaled up?" [26][27][28]
2025-03 The 2050 Tokyo Strategy is adopted. The metropolitan government's public-relations publication writes that about 30,000 opinions were analyzed with broad listening and used as a reference in drafting it [29]
2025-03-16 DD2030 releases "Kouchou AI" as open source [30]
2025-04-30 The town of Utazu in Kagawa Prefecture publishes the results of a trial of Kouchou AI. It reports that 396 free-form answers from a residents' survey could be organized in about 10 minutes [31]. → Broad listening in local governments
2025-05-02 The Japanese edition of PLURALITY goes on sale (Cybozu Shiki Books, distributed by ライツ社 [Raitsusha], translated by Hiroo Yamagata, commentary by Ken Suzuki) [32]
2025-05-06 to 13 "Tokyo Plurality Week 2025", timed to the two authors' visit to Japan. The events announced include a lecture at Yasuda Auditorium of the University of Tokyo, a publication event at Keio University's Mita campus, and a book-launch talk at Roppongi Tsutaya Books [33]
2025-05-07 Anno steps down as a board member of DD2030 for the sake of political neutrality [23]
2025-05-08 At a press conference, Anno announces the founding of a new party, Team Mirai [34]
2025-05-16 Team Mirai publishes a very early version (ver0.1) of its manifesto. It gathers opinions through channels including "Idobata Policy", where people send their views by talking with an AI, and releases ver1.0 on July 5 [35]
2025-06-13 Iwate Prefecture publishes the results of its test of broad listening with Kouchou AI [36]
2025-07-02 Shibuya Ward in Tokyo publishes the results of analyzing 6,037 free-form answers from its residents' opinion survey with Kouchou AI [37]
2025-07-20 In the count for the House of Councillors election (a chamber of Japan's parliament), Team Mirai wins 1 seat (about 2.6% of the vote) and meets the requirements to count as a political party [38]
2025-10-02 Team Mirai launches "Mirai Marumie Seiji Shikin" (みらい まる見え政治資金), which shows how political funds flow [39]
2025-10-16 Team Mirai launches "Mirai Gikai" (みらい議会) [40]
2025-11-29 At Code for Japan Summit 2025, Ken Suzuki, Nishio and Nanako Yamaguchi (the video description writes the given name as 奈々子 rather than 菜々子; which is correct is unconfirmed) hold a discussion titled "Looking back on the digital democracy boom" (moderated by Haruyuki Seki) [41]

2026: parliament, a party convention, a research center and the Broad Listening book

Date Event
2026-02-08 In the 51st House of Representatives election (the other chamber of parliament), 11 Team Mirai candidates are elected (a total of 3,813,749 votes across 8 proportional-representation blocks, 6.66% of the vote) [42]
2026-02-27 KGRI, a research institute of Keio University, approves the establishment of the "Plurality and Nameraka Society Research Center (PRANCE)". The principal investigator is Keigo Komamura, and the co-director is Ken Suzuki. Its members for fiscal year 2026 list Tang and Weyl as visiting professors [43]. → The X Dignity Center and PRANCE at Keio University
2026-05-21 In the Internal Affairs and Communications Committee of the House of Councillors, Anno asks questions about a bill amending the law on preventing the misuse of mobile phones. He says the questions were based on voices including 264 interviews (about 47 hours in total) gathered through Mirai Gikai [44]
2026-07-18 Team Mirai's first party convention, "Team Mirai Summit 2026". More than 200 party members gather at the venue, and about 1,100 people, including those online, take part in votes by smartphone [45]
2026-08-02 "Digital Democracy Summit 2026". Tang's participation on the day is announced [46]. According to the official website, it is hosted by PRANCE of Keio University's KGRI and DD2030, and held at a venue on Keio's Mita campus and online [47]. It is a separate event from the party convention "Team Mirai Summit"
2026-09 (planned) A book on broad listening, Broad Listening (Japanese title 政治・自治体・企業に広がるブロードリスニング, roughly "Broad listening spreading through politics, local government and business"). It was written in the DD2030 community with Shinta Nakayama as lead author, and according to DD2030's page it is due from Impress around September [48][49]

Reading the flow

The book came first, and practice caught up later. From 2023 to early 2024, the original, published free on the web, was being read through events like Plurality Tokyo and through volunteer translation [1][5][6]. According to section 4-1 of the book Broad Listening, Anno met Haruyuki Seki through Nishio's introduction, and encountering Talk to the City there was what led to its use in the election [7].

The governor's election was a turning point. Chapter 5-4 of the Japanese edition of Plurality, "Augmented Deliberation", writes Anno's election into the book as an example of new ways of discussion starting to appear in elections too [50].

Government took it up. According to chapter 5 of the book Broad Listening, the Tokyo Metropolitan Government announced that it had used broad listening to analyze its call for opinions and had revised how the strategy's policies were grouped [51]. However, the same chapter 5 examines this and finds that much of the change came from changes in the times or updates to earlier policies, and that the story that "broad listening changed policy" is at least partly overstated [51].

The tools became "everyone's". Because DD2030 released Kouchou AI as open source, local governments such as the town of Utazu, Iwate Prefecture and Shibuya Ward were able to analyze the free-form answers in their own surveys [30][31][36][37].

A party entered the system. Team Mirai won seats in the 2025 House of Councillors election and the 2026 House of Representatives election, and it has used the voices it gathered in parliamentary questions and held its party convention's votes by smartphone [38][42][44][45]. This article lists these events as facts. It does not judge whether any party or policy is good or bad.

Further reading

  1. The Plurality movement in Japan — how the book has been received, including translation, reading groups and reviews (an article on this site)
  2. Plurality, chapter 5-4 "Augmented Deliberation" (English, book) — https://www.plurality.net/v/chapters/5-4/eng/
  3. Broad Listening, chapter 4 "The Spread of Broad Listening in Japan" (Japanese and English, book, readable on the web) — https://broadlisteningbook.com/
  4. Manuscript of Broad Listening, chapters 5 (Tokyo), 6 (national elections) and 8 (local governments) (in Japanese; English translation in the same repository) — https://github.com/digitaldemocracy2030/broad-listening-book
  5. Tokyo Metropolitan Government, final results of the broad listening analysis for the draft "2050 Tokyo Strategy" (in Japanese, government document) — https://broadlistening.seisakukikaku.metro.tokyo.lg.jp/20250131/index.html
  6. Digital Democracy 2030, "広聴AI" (Kouchou AI) (in Japanese, official page) — https://dd2030.org/kouchou-ai/

Sources

  1. Hirokazu Nishio, "Plurality Tokyo 2023" (notes from the day, in Japanese) — https://scrapbox.io/nishio/Plurality_Tokyo_2023
  2. Recording of the Plurality Tokyo 2023 stream (YouTube) — https://www.youtube.com/watch?v=Ma7E6T16n5Y
  3. Hirokazu Nishio, "Talk to the City勉強会" (Talk to the City study session) (in Japanese) — https://scrapbox.io/nishio/Talk_to_the_City勉強会
  4. Tang's remarks at Plurality Seoul (YouTube) — https://www.youtube.com/watch?v=4J9v-j995LU
  5. Hirokazu Nishio, "Words as Public Goods" slides (2024-01-03) — https://www.dropbox.com/scl/fi/46shanz5sc768akolksdd/Words-as-Public-Goods.pdf
  6. Plurality Institute, "The new seminal book on plurality has launched!" (2024-05-20) — https://www.plurality.institute/blog-posts/book-launch-plurality-the-future-of-collaborative-technology-and-democracy-by-e-glen-weyl-audrey-tang-and-the-plurality-community
  7. Broad Listening, chapter 4, section 1 "Takahiro Anno's Initiatives in the 2024 Tokyo Governor Election" (in Japanese; English translation in the same repository) — https://github.com/digitaldemocracy2030/broad-listening-book/blob/f69c60c838a91b91668abf109d7093b240610139/en/04_01_takahiro_anno_initiatives.md ［CC BY-NC 4.0］
  8. Takahiro Anno, full transcript of the press conference announcing his run for Governor of Tokyo (note, 2024-06-07, in Japanese) — https://note.com/takahiroanno/n/nead5c2e2454b
  9. Takahiro Anno, "東京都知事選の「参加型マニフェスト」を公開します" (Publishing a "participatory manifesto" for the Tokyo governor's election) (note, 2024-06-20, in Japanese) — https://note.com/takahiroanno/n/n38a34f107867
  10. Team Mirai, report on its first party convention "Team Mirai Summit 2026" (note, 2026-08-04, in Japanese) — https://note.com/team_mirai_jp/n/n5ed65c62e52b
  11. Funding the Commons Tokyo 2024, "Broad listening in practice" (Takahiro Anno and Audrey Tang, YouTube) — https://www.youtube.com/watch?v=k6bZ2qayBQA
  12. Funding the Commons Tokyo 2024, "Design for Plurality (Panel)" (YouTube) — https://www.youtube.com/watch?v=CjwyCt9LZvI
  13. Hirokazu Nishio, "⿻Plurality in Japan" slides (prepared for FtC Tokyo 2024) — https://www.dropbox.com/scl/fi/bzmmg6y9rzep2po2rmjt6/Plurality-in-Japan.pdf ; recording — https://www.youtube.com/watch?v=xM6SUDbqQc0
  14. Glen Weyl, "日本にデジタル民主主義の日が昇るとき" (When the sun of digital democracy rises over Japan), Cybozu Shiki (2025-05-02, in Japanese) — https://cybozushiki.cybozu.co.jp/articles/m006261.html
  15. Takahiro Anno, on releasing the source code and other materials the campaign developed for the governor's election (note, 2024-09-30, in Japanese) — https://note.com/takahiroanno/n/nf0bc57572dd7
  16. Anno campaign staff, "都知事選で使ったブロードリスニングの技術で衆院選を解析してみた" (We analyzed the House of Representatives election with the broad listening technology used in the governor's election) (note, 2024-10-26, in Japanese) — https://note.com/annotakahiro24/n/ndd21a8ba3eec
  17. Hirokazu Nishio, "Code for Japan Summit 2024" (in Japanese) — https://scrapbox.io/nishio/Code_for_Japan_Summit_2024
  18. Code for Japan Summit 2024 keynote (Audrey Tang and Takahiro Anno, YouTube, published 2024-12-03) — https://www.youtube.com/watch?v=eia0HjcqCN0
  19. Tokyo Metropolitan Government, call for opinions toward "Shin Tokyo 2050 (provisional name)" (2024-11-22, in Japanese) — https://www.metro.tokyo.lg.jp/information/press/2024/11/2024112203
  20. GovTech Tokyo, announcement of Takahiro Anno's appointment as adviser (2024-11-22, in Japanese) — https://www.govtechtokyo.or.jp/news/2024/11/22/3228/
  21. Tokyo Metropolitan Assembly, minutes (2024-12-03, governor's policy speech, in Japanese) — https://www.gikai.metro.tokyo.lg.jp/record/proceedings/2024-4/01.html
  22. Tokyo Metropolitan Government, interim report on opinions submitted for "Shin Tokyo 2050 (provisional name)" (2024-12-16, in Japanese) — https://www.metro.tokyo.lg.jp/information/press/2024/12/2024121619
  23. Anno campaign staff, full transcript of the press conference launching "Digital Democracy 2030" (note, in Japanese) — https://note.com/annotakahiro24/n/nfd4a855cd1a8
  24. Tokyo Metropolitan Government, "2050東京戦略 東京 もっとよくなる（案）" (Draft 2050 Tokyo Strategy) (2025-01-31, in Japanese) — https://www.metro.tokyo.lg.jp/information/press/2025/01/2025013152
  25. Tokyo Metropolitan Government, final results of the broad listening analysis for the draft "2050 Tokyo Strategy" (2025-01-31, in Japanese) — https://broadlistening.seisakukikaku.metro.tokyo.lg.jp/20250131/index.html
  26. Ken Suzuki, "Pluralityとなめらかな社会" (Plurality and the Nameraka Society) slides (Plurality Tokyo Namerakaigi, 2025-02-25, in Japanese) — https://docs.google.com/presentation/d/1Snsu2eQJ_vAWgmk3_9eyJnBQ9l8wfpgKfKufkIAkDH4/
  27. Takahiro Anno, "デジタル民主主義2030の紹介" (Introducing Digital Democracy 2030) (YouTube, in Japanese) — https://www.youtube.com/watch?v=J30IxnMCqXE
  28. Hirokazu Nishio, "デジタル民主主義をスケールさせるには？" (How can digital democracy be scaled up?) (YouTube, in Japanese) — https://www.youtube.com/watch?v=07BQsWtF5KA
  29. Koho Tokyo-to (the metropolitan government's public-relations publication), "2050東京戦略 東京もっとよくなる" (2050 Tokyo Strategy) (March 2025, in Japanese) — https://www.koho.metro.tokyo.lg.jp/2025/03_02_sp/01.html
  30. Digital Democracy 2030, "広聴AI" (Kouchou AI) (in Japanese) — https://dd2030.org/kouchou-ai/
  31. Town of Utazu, broad listening trial (2025-04-30, in Japanese) — https://www.town.utazu.lg.jp/page/4114.html
  32. Press release for the Japanese edition (PR TIMES, 2025-05-02, in Japanese) — https://prtimes.jp/main/html/rd/p/000000017.000101800.html
  33. Digital Democracy 2030, "Tokyo Plurality Week 2025" (in Japanese) — https://note.com/digitaldemocracy/n/n4c91cddef564
  34. Takahiro Anno, full transcript of the press conference founding Team Mirai (note, 2025-05-08, in Japanese) — https://note.com/takahiroanno/n/nebe958c4651c
  35. Anno campaign staff, summary of updates to the Team Mirai manifesto (note, 2025-06-15, in Japanese) — https://note.com/annotakahiro24/n/n31abc00c76f3
  36. Iwate Prefecture, results of its test of broad listening (2025-06-13, in Japanese) — https://www.pref.iwate.jp/kensei/kouchoukouhou/1086730.html
  37. Shibuya Ward, press release (2025-07-02, in Japanese) — https://www.city.shibuya.tokyo.jp/kusei/hodo/hodo-2025/hodo_20250702.html
  38. Broad Listening, chapter 6, section 1 "Team Mirai's Efforts in the 2025 House of Councillors Election" (in Japanese; English translation in the same repository) — https://github.com/digitaldemocracy2030/broad-listening-book/blob/f69c60c838a91b91668abf109d7093b240610139/en/06_01_team_mirai.md ［CC BY-NC 4.0］
  39. Team Mirai, announcing the launch of "みらい まる見え政治資金" (note, 2025-10-02, in Japanese) — https://note.com/team_mirai_jp/n/n58fca6f9e4e8
  40. Team Mirai, announcing the launch of "みらい議会" (note, 2025-10-16, in Japanese) — https://note.com/team_mirai_jp/n/nd1656aa5f86d
  41. Code for Japan Summit 2025, "デジタル民主主義ブームを振り返る" (Looking back on the digital democracy boom) (YouTube, in Japanese) — https://www.youtube.com/watch?v=Laef392EX6g
  42. Team Mirai, report on the results of the 51st House of Representatives election and its next steps (note, 2026-02-13, in Japanese) — https://note.com/team_mirai_jp/n/n4a15f23f129d
  43. Keio University KGRI, "プルーラリティ・なめらかな社会研究センター" (Plurality and Nameraka Society Research Center) (in Japanese) — https://www.keio.ac.jp/ja/org/kgri/project/2026/P26-22/
  44. Team Mirai, full transcript of party leader Takahiro Anno's questions in the House of Councillors Internal Affairs and Communications Committee (2026-05-21) (note, in Japanese) — https://note.com/team_mirai_log/n/n3c57f6729185
  45. Team Mirai, "1,100人がスマホで投票した日" (The day 1,100 people voted by smartphone), behind the scenes of its first party convention (note, 2026-09-01, in Japanese) — https://note.com/team_mirai_jp/n/n2092f0dc600d
  46. Digital Democracy 2030, announcement of "Digital Democracy Summit 2026" on August 2 (in Japanese) — https://dd2030.org/topics/summit2026.html
  47. Digital Democracy Summit 2026, official website (in Japanese) — https://summit.dd2030.org/
  48. Digital Democracy 2030, "ブロードリスニング" (Broad listening) (in Japanese) — https://dd2030.org/broad-listening
  49. Manuscript repository of Broad Listening (in Japanese; English translation in the same repository) — https://github.com/digitaldemocracy2030/broad-listening-book ［CC BY-NC 4.0］
  50. Plurality, 5-4 "拡張熟議" (Augmented Deliberation), Japanese edition — https://www.plurality.net/v/chapters/5-4/jpn/ ［CC0］
  51. Broad Listening, chapter 5 "Shin Tokyo 2050—Did Broad Listening Change a City of 14 Million? (2024-2025)" (in Japanese; English translation in the same repository) — https://github.com/digitaldemocracy2030/broad-listening-book/blob/f69c60c838a91b91668abf109d7093b240610139/en/05_tokyo_shin_tokyo_2050_policy_shift.md ［CC BY-NC 4.0］
Related: What is the Plurality movement in Japan? ・ What was Takahiro Anno's 2024 Tokyo campaign? ・ What is the broad listening for Tokyo's "Shin Tokyo 2050"? ・ What is Digital Democracy 2030 (DD2030)? ・ What is Kouchou AI? ・ What is Team Mirai? ・ What is broad listening in local governments? ・ What is Broad Listening? ・ What are the X Dignity Center and PRANCE at Keio University?

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