Updated on 2025/07/26

写真a

 
ITO, Ryo
 
Affiliation
Faculty of Letters, Arts and Sciences, School of Humanities and Social Sciences
Job title
Associate Professor
Degree
PhD ( 2017.12 University of St Andrews/Stirling University )
Profile

Ryo Ito is an assosiate professor at Waseda Univerity, located in Tokyo. He works on early analytic philosophy and philosophy of logic. He did his PhD at the St Andrews and Stirling Philosophy Programme while joining Arché Philosophical Research Centre as a graduate research member (2013-2017). His dissertation was a historical study of the early Russell's conception of logic. He was a JSPS (Japan Society for the Promotion of Science) research fellow at Keio University (2019-2021), where he worked on the project of accounting for various features of mathematical proofs in terms of the notion of rule. He joined the Faculty of Arts, Letters and Sciences at Waseda University in 2021. 

Research Experience

  • 2023.04
    -
    Now

    The University of Tokyo   College of Arts and Sciences   Part-time Lecturer

  • 2021.04
    -
    Now

    Waseda University   Faculty of Letters, Arts and Sciences   Associate Professor

  • 2020.10
    -
    2021.03

    Kyoto Seika University   Part-time Lecturer

  • 2019.04
    -
    2021.03

    Japan Society for the Promotion of Science Research Fellow (PD/CPD)

  • 2019.04
    -
    2020.09

    Shiga University   Faculty of Economics   Part-time Lecturer

  • 2019.04
    -
    2020.03

    Ryukoku University   Faculty of Letters   Part-time Lecturer

  • 2018.04
    -
    2020.03

    Doshisha University   Faculty of Culture and Information Science   Teaching Assistant

  • 2018.04
    -
    2020.03

    Ryukoku University   Faculty of Sociology   Part-time Lecturer

  • 2017.04
    -
    2020.03

    Kyoto University   Faculty of Letters   Part-time Lecturer

  • 2018.04
    -
    2019.03

    Osaka University of Health and Sport Sciences   Part-time Lecturer

  • 2014.09
    -
    2016.06

    University of St Andrews   Tutor

  • 2013.11
    -
    2016.06

    Arché Philosophical Research Centre

  • 2011.04
    -
    2013.08

    Japan Society for the Promotion of Science Research Fellow (DC1)

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Education Background

  • 2013.09
    -
    2017.12

    University of St Andrews & Stirling University   PhD Programme   Philosophy  

  • 2011.04
    -
    2013.09

    Kyoto Univesity   Graduate School of Letters (PhD)   Philosophy  

  • 2009.04
    -
    2011.03

    Kyoto University   Graduate School of Letters (Master)   Philosophy  

  • 2005.04
    -
    2009.03

    Kyoto University   Faculty of Letters   Japanese Philosophy  

Research Areas

  • Philosophy and ethics   Logic, Early Analytic Philosophy

Awards

  • Ishimoto Award

    2023.12   Philosophy of Science Society, Japan   "The early Russell's view of the universe as fully describable"

  • Encouragement Award

    2019.11   Japan Association for Philosophy of Science   "The Origin of the Theory of Types"

 

Papers

  • The Expressive Role of Variables and Disagreements about Rules

    Ryo Ito

    Annals of the Japan Association for Philosophy of Science   33   93 - 108  2024  [Refereed]

    DOI

  • Real and illusionary difficulties in conceptual learning in mathematics: comparison between constructivist and inferentialist perspectives

    Yusuke Uegatani, Hiroki Otani, Shintaro Shirakawa, Ryo Ito

    Mathematics Education Research Journal    2023.11  [Refereed]

    　View Summary

    Abstract

    Due to the learning paradox, students cannot have real difficulty in understanding a mathematical concept that they have not yet understood. There is a gap between real difficulties, directly experienced by students, and illusionary ones, only observed by researchers. This paper aims to offer a critical reflection on our understanding of the term difficulty in mathematics education research. We start this paper by arguing that a constructivist perspective, which has often been adopted in researches on mathematical task design, can deal with difficulties in solving a mathematical problem, but it cannot theoretically deal with those in understanding a mathematical concept. Therefore, we need the alternative philosophy of Robert Brandom’s inferentialism to capture students’ real difficulties in conceptual learning. From an inferentialist perspective, we introduce the idea of illusionary and real difficulties. The former is defined as what students cannot do, but they are not conscious of what they should do, while the latter is defined as what students cannot do despite their consciousness of what they should do. Through an eighth grade classroom episode, we argue that it is important in mathematics education research to focus not only on illusionary difficulties but also on the transition from illusionary to real difficulties. Researchers are encouraged to design a learning environment in which students become conscious of what they cannot do and to observe their mathematics learning in such an environment.

    DOI

    Scopus

    3
    Citation
    (Scopus)

  • An Interpretation of the Gray’s Elegy Argument

    Ito, R.

    Journal of the History of Analytical Philosophy   11 ( 6 ) 1 - 38  2023.10  [Refereed]

    DOI

    Scopus

  • ラッセルの「見知り」について

    伊藤 遼

    哲学世界   ( 45 ) 1 - 16  2022

  • 外部世界をめぐる論争における観念論と実在論

    伊藤 遼

    プロセス思想   22   20 - 34  2022

    DOI

  • An Inferentialist Account of the Historiography of Philosophy

    Ryo Ito

    Bulletin of the Graduate School of Letters, Arts and Sciences of Waseda University   67   23 - 40  2022

  • The early Russell's view of the universe as fully describable

    Ryo Ito

    Kagaku Tetsugaku (The Philosophy of Science Society, Japan)   53 ( 2 ) 25 - 44  2021  [Refereed]

    DOI

  • On the ‘Psychological Origins’ of Analytic Philosophy

    Ryo Ito

    Philosophy (Tetsugaku)   72   67 - 78  2021  [Refereed]

    DOI

  • Russell’s theories of judgement

    Ito, R.

    British Journal for the History of Philosophy   28 ( 1 ) 1 - 22  2020.01  [Refereed]

    DOI

    Scopus

    1
    Citation
    (Scopus)

  • The Origin of the Theory of Types

    Ryo Ito

    Annals of the Japan Society for Philosophy of Science   ( 27 )  2018.09  [Refereed]

  • ブラッドリーの判断論と初期ラッセルの判断概念

    伊藤 遼

    Nagoya Journal of Philosophy   13   16 - 25  2018.06  [Refereed]

  • Russell's Metaphysical Accounts of Logic

    Ryo Ito

    University of St Andrews, Stirling University (SASP Programme)    2017.08

  • Russellʼs conception of logic as a key to understanding the relationship between logic and metaphysics

    ITO Ryo

    Philosophy (Tetsugaku)   2014 ( 65 ) 118 - 134  2014.04  [Refereed]

    　View Summary

    Although Bertrand Russell is now widely recognized as a founder of modern mathematical logic, his work on logic suggests that he himself had a totally different conception of logic from that of modern mathematical logic. Many commentators have tried to give an account of this difference by explaining logic for him as a universal language, a formal language that captures ʻthe logical furniture of the universeʼ. This explanation, however, turns out to be misleading, when we focus upon his view of language as a ʻtransparent medium.ʼ It seems to be more correct to think that Russell conceived of logic as concerned with the logical furniture of the world, or more precisely, with the forms that govern the way the world is, while he took a formal language merely as a medium to describe these forms. I will call such a view of logic ʻthe metaphysical conception of logic.ʼ The aim of this paper is to show that, by attributing this conception of logic to Russell, we can reach a better understanding of the difference between logic as Russell conceived it and modern mathematical logic. To illustrate his metaphysical conception of logic I will focus upon two features of Russellʼs philosophy, which in turn suggest that he shared the metaphysical conception of logic with his predecessors. Although I cannot develop this point fully,this would be another advantage of the above account of Russellʼs logic.

    DOI CiNii

  • 証明論的意味論とその課題

    伊藤 遼

    哲学論叢   ( 37 ) S37 - S48  2011.09

  • Type Theory: its Origin and Development

    Tetsugaku Ronso   38 ( 38 ) S49 - S60  2011.09

    CiNii

  • Russell's Substitutional Theory and Two Paradoxes

      ( 38 ) 97 - 108  2011.09  [Refereed]

    CiNii

  • Russell's substitutional theory and its position in Russell scholarship

      ( 37 ) 58 - 69  2010.09  [Refereed]

    CiNii

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Books and Other Publications

  • 一元論の多様な展開 : 近代ドイツ哲学から、世紀転換期の英米哲学を経て、現代の分析哲学まで

    小山 虎 太田 匡洋 津田 栞里 真田 美沙 三浦 隼暉 伊藤 遼 山根 秀介 米田 翼 雪本 泰司 立花 達也 大畑 浩志 ジョナサン シャファー モーエンス レルケ( Part： Contributor, 6章)

    晃洋書房  2025.03 ISBN: 9784771038738

  • 世紀転換期の英米哲学における実在論と観念論：現代哲学のバックグラウンドの研究

    染谷 昌義 染谷 昌義・小山 虎・齋藤 暢人 有村 直輝・伊藤 遼・入江 哲朗・大厩 諒・岸本 智典( Part： Contributor, 2章「ムーアの実在論と英国哲学史におけるその位置づけ」)

    Ratik  2024.03 ISBN: 9784907438654

  • Kit Fine on Truthmakers, Relevance, and Non-Classical Logic (Outstanding Contributions to Logic)

    Leon Horsten, Ryo Ito( Part： Contributor, Chapter 29 "Russell and Fine on Variable Objects")

    Springer  2023.12

Presentations

  • Wittgenstein’s Notion of Logical Coordinates

    The 8th Workshop of the Stirling Early Analytic Group: Ineffability and the Tractatus Workshop 

    Presentation date： 2025.04

  • Inference, Understanding and Foundationalism in Mathematics

     [Invited]

    LLAL@GSIS 

    Presentation date： 2025.03

  • The Notion of de re Acknowledgement and its Implications

     [Invited]

    Symposium: Toward a Contextual Realism 

    Presentation date： 2025.03

  • An Inferentialist Account of Understanding

     [Invited]

    The 4th France-Japan Colloquium “Disagreement in Logic and Reasoning” with a special Panel Session on Normativity and divergences of forms of life 

    Presentation date： 2025.02

  • Material Inferences in Mathematics

     [Invited]

    France-Japan Philosophy One-Day Meeting – Philosophy of logic and mathematics, Wittgenstein, Rules, Norms of Life 

    Presentation date： 2025.02

  • Wittgenstein’s Existential Account of Truth and the Notion of Logical Coordinates

    Ryo Ito  [Invited]

    International Symposium on the “Notions of Truth and Being" 

    Presentation date： 2025.01

  • 数学の実践における実質推論と形式推論

    伊藤遼

    日本科学哲学会 

    Presentation date： 2024.12

  • ブランダムの推論主義と哲学的論理学

    伊藤遼  [Invited]

    Kobe Philosophy Seminar Series 

    Presentation date： 2024.10

  • Wittgenstein's Notion of 'the logic of our language' and its Historical Background

    Ryo Ito  [Invited]

    Presentation date： 2024.09

  • Russell and Wittgenstein on Fact and Complex

    Ryo Ito

    Society for the Study of the History of Analytical Philosophy 

    Presentation date： 2024.06

  • Expression, Extension, and Disagreement about Rules

    Ryo Ito

    Le Colloque Franco-Japonais sur le Désaccord en Logique et dans le Raisonnement 

    Presentation date： 2024.03

  • Russell's Notion of 'Genuine Names'

    Ryo Ito

    A Workshop on Russell, Leśniewski and beyond 

    Presentation date： 2024.03

  • Rule-Following Paradox and the Expressive Role of Variables

    Ryo Ito

    The 2023 annual meeting of the Japan Association for Philosophy of Science 

    Presentation date： 2023.06

  • Reading 'On Denoting' in Context

    Ryo Ito

    The 2023 annual meeting of the Japan Association for Contemporary and Applied Philosophy 

    Presentation date： 2023.04

  • Variables and Various Sorts of Disagreements about Rules

    Ryo Ito  [Invited]

    France-Japan Workshop on "Philosophy and Ethics of TV drama series" and "Disagreement in Logic and Reasoning" 

    Presentation date： 2023.03

  • Russell and Wittgenstein on Facts and Complexes

    Ryo Ito

    Summer Workshop on Various Aspects of Wittgenstein's Thought 

    Presentation date： 2022.08

  • 推論主義に基づく数学的推論の説明とその限界

    伊藤遼

    早稲田哲学会 

    Presentation date： 2022.07

  • An Interpretation of the Gray's Elegy Argument

    Ryo Ito

    Society for the Study of the History of Analytical Philosophy 

    Presentation date： 2022.07

  • ラッセルとヴィトゲンシュタイン

    伊藤遼

    科学基礎論学会 

    Presentation date： 2022.06

  • ラッセルの「構成」概念とスタウトの心理学

    伊藤遼  [Invited]

    日本ホワイトヘッド・プロセス学会 

    Presentation date： 2021.10

  • フレーゲのパズルとラッセルの存在論

    伊藤 遼  [Invited]

    存在論・形而上学ワークショップ・三田ロジックセミナー 

    Presentation date： 2021.09

  • Two Epistemological Problems in the Early Russell’s Ontology

    Ryo Ito

    Society for the Study of the History of Analytical Philosophy 

    Presentation date： 2021.07

  • いわゆる分析哲学の心理学的起源について

    伊藤 遼

    日本哲学会 

    Presentation date： 2020.06

  • 可能性を解放する論理と事実の形式を解明する論理 – 1910年代 ラッセルにおける二つの論理観

    伊藤 遼  [Invited]

    論理思想史に関する研究集会 

    Presentation date： 2020.02

  • The Notion of Dependence and the Ramified Theory of Types

    Ryo Ito  [Invited]

    Bochum Non-classical Logic Workshop I 

    Presentation date： 2020.02

  • Frege’s Puzzle and the Early Russell’s Logic of Relations

    Ryo Ito

    Society for the Study of the History of Analytical Philosophy 

    Presentation date： 2019.06

  • Geometrical Reasoning and Moves in Space of Reason

    Ryo Ito

    Logic Workshop–Wittgenstein, Phenomelogical Ontology, and Contextualism 

    Presentation date： 2019.06

  • Diagrammatic Reasoning and Two Kinds of Rules

    Ryo Ito

    The 11th annual meeting of Japan Association for the Contemporary and Applied Philosophy 

    Presentation date： 2019.04

  • The Linguistic Turn and Russell's Egocentric Predicament

    Ryo Ito

    Kyoto-NTU Philosophy Colloquium of Graduate Students: Self, Subjectivity, and Consciousness 

    Presentation date： 2019.03

  • Towards A Realist Interpretation of Principia Mathematica

    Ryo Ito  [Invited]

    Yang Ming–Kyoto Mini Workshop 

    Presentation date： 2019.03

  • Mathematics and Its Rules: Trivialities in Proofs

    Ryo Ito  [Invited]

    The 4th Conference on Contemporary Philosophy in East Asia 

    Presentation date： 2018.08

  • The Early Russell's Ontology and the Univocity of Being

    Ryo Ito  [Invited]

    Making Sense Of: A Workshop with and about Adrian Moore 

    Presentation date： 2018.07

  • Logicism and the Notion of Structure

    Ryo Ito

    Japan Association for Philosophy of Science 

    Presentation date： 2018.06

  • 二つの真理概念と誤謬の問題−ラッセルはなぜ判断の多項関係理論を採用したのか

    伊藤 遼  [Invited]

    論理学の哲学・数学の哲学セミナー 

    Presentation date： 2018.04

  • The Unity of the Proposition and Russell’s Theories of Truth

    Ryo Ito  [Invited]

    French-Japanese Workshop “Philosophy of Logic and Mathematics’ 

    Presentation date： 2018.01

  • ムーアの概念とラッセルの項

    伊藤 遼

    日本科学哲学会年次大会 

    Presentation date： 2017.11

  • ラッセルの命題論とブラッドリーの判断論

    伊藤 遼

    関西哲学会年次大会 

    Presentation date： 2017.10

  • Rules and Trivialities in Proofs

    Ryo Ito  [Invited]

    Kyoto Workshop on Logic and Metaphysics 

    Presentation date： 2017.10

  • Classes, Fusions and Russell’s Theories of Classes

    Ryo Ito  [Invited]

    Kyoto Philosophical Logic Workshop II 

    Presentation date： 2017.06

  • ラッセルの「不完全記号」概念と分岐タイプ理論

    伊藤 遼

    科学基礎論学会総会 

    Presentation date： 2017.06

  • The Unity of the Proposition and Russell’s Theories of Truth

    Ryo Ito

    The 5th Seoul Philosophy Graduate Conference 

    Presentation date： 2017.06

  • Bradley’s Notion of Judgment and Russell’s Theories of Truth

    Ryo Ito  [Invited]

    International Graduate Student Conference on Asian Philosophy 

    Presentation date： 2017.04

  • Bradley, the unity of the proposition and material implication

    Ryo Ito  [Invited]

    Kyoto Philosophical Logic Workshop 

    Presentation date： 2017.02

  • Mathematical Reasoning and Paraconsistent Logic

    Ryo Ito  [Invited]

    Kyoto Non-Classical Logic Workshop II 

    Presentation date： 2016.10

  • Russell’s Metaphysical Conception of Logic

    Ryo Ito  [Invited]

    Bristol-Kyoto Workshop 

    Presentation date： 2013.09

  • ラッセルの型理論の起源

    伊藤 遼

    科学基礎論学会総会 

    Presentation date： 2013.06

  • ラッセルにみる論理と哲学の関係

    伊藤 遼

    日本哲学会大会 

    Presentation date： 2013.05

  • 初期ラッセルにおける観念論論駁

    伊藤 遼

    科学基礎論学会総会 

    Presentation date： 2012.06

  • 『数学の諸原理』におけるラッセルの言語観

    伊藤 遼  [Invited]

    慶應義塾大学 GCOE プログラム「論理と感 性の先端的教育研究拠点」 

    Presentation date： 2011.12

  • ラッセルの置き換え理論と二つのパラドクス

    伊藤 遼

    哲学若手研究者フォーラム 

    Presentation date： 2011.07

  • Russell’s Substitutional Theory and Two Paradoxes

    Ryo Ito

    Annual Conference of Australazian Association of Philosophy 

    Presentation date： 2011.07

  • 初期ラッセルにみる命題の存在論

    伊藤 遼

    科学基礎論学会総会 

    Presentation date： 2011.06

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Research Projects

  • 変項の理論としての分岐タイプ理論

    日本学術振興会  科学研究費助成事業

    Project Year :

    2025.04
    -
    2028.03
     

    伊藤 遼

  • 推論主義で迫る概念ネットワークの深化：数学教育，教育哲学，哲学の互恵的発展

    日本学術振興会  科学研究費助成事業

    Project Year :

    2024.04
    -
    2028.03
     

    上ヶ谷 友佑, 杉田 浩崇, 白川 晋太郎, 大谷 洋貴, 伊藤 遼

  • The Concept of Free Will: An Etiological Study Toward Conceptual Engineering

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2023.04
    -
    2027.03
     

  • Interdisciplinary studies on philosophy of logic: Toward the development of philosophy of proof and demonstration

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Project Year :

    2021.04
    -
    2026.03
     

    Mitsuhiro Okada, Ryo Ito Koji Mineshima

  • Realism and Idealism in Early Analytic Philosophy

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists

    Project Year :

    2022.04
    -
    2025.03
     

  • Study on "Disagreement" in logic

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Project Year :

    2019.10
    -
    2024.03
     

  • JSPS Research Fellow (PD)

    Japan Society for Promotion of Science  Research Fellowship for Young Scientists

    Project Year :

    2019.04
    -
    2021.03
     

    Ryo Ito

  • JASSO Scholarship for Overseas Study

    Japan Student Services Organization  Scholarship for Overseas Study

    Project Year :

    2013.09
    -
    2016.06
     

    Ryo Ito

  • JSPS Research Fellow (DC1)

    Japan Society for Promotion of Science  Research Fellowship for Young Scientists

    Project Year :

    2011.04
    -
    2013.08
     

    Ryo Ito

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Syllabus

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Sub-affiliation

  • Affiliated organization   Global Education Center

Internal Special Research Projects

  • 初期分析哲学史における「構成」概念の探究

    2021  

    　View Summary

    本特定研究課題は、分析哲学、すなわち、現代の英語圏を中心とする哲学の営みの出発点の一つともなった「外部世界 external world」の実在性をめぐる論争の内実を文献学的な探求を通じて整理することで、分析哲学の創始者の一人であるバートランド・ラッセルが提示した外部世界の「論理的構成 logical construction」という考えに対するより正確な理解を得るものである。　この課題への取り組みの成果は、国内外の学会にて、査読付き発表（Society for the Study of the History of Analytical Philosophy, 7月, Vienna/online）と招待講演（日本ホワイトヘッド・プロセス学会10月、オンライン）という形で公表されている。