Koutaro Kamada

Ph.D student (2024.4-) / DC2, JSPS Research Fellowship (2026.4-) （selected）

Researchmap Google Scholar ORCID CV (PDF)

About

Affiliation

Yuizono Laboratory , Japan Advanced Institute of Science and Technology (JAIST).

Field of research

CSCW, HCI, Decision Sciences.

Keywords

Remote Collaboration, Human-AI Collaboration, Decision-Making, Virtual Reality.

Contact

kamada [at] jaist.ac.jp / kamada [at] stu.kanazawa-u.ac.jp

Education

  • 2018.4 - 2022.3 — Bachelor of Economics, Takasaki City University of Economics.
  • 2022.4 - 2024.3 — Master of Philosophy, Division of Transdisciplinary Sciences, Graduate School of Advanced Science and Technology, JAIST / Kanazawa University. [Outstanding students]
  • 2024.4 - — Ph.D student, Division of Transdisciplinary Sciences, Graduate School of Advanced Science and Technology, JAIST / Kanazawa University.

Awards

  • Honorable Mention — The 20th International Conference on Knowledge, Information and Creativity Support Systems.
  • Telecommunications Advancement Foundation Award 2023 — Telecom Interdisciplinary Research Student Award.
  • Awarding of Outstanding Students (MPhil) in JAIST (2024.3).
  • DICOMO2023 Outstanding Paper Award.

Project

Computer-Mediated Communication(2022-)

We study how to make group discussions—face-to-face, text, video, and VR—work better for everyone. Our focus is group dynamics (e.g., social loafing). Through experiments and data analysis, we identify why this happens and provide practical CMC tool designs that counter it.

Keywords: Remote Collaboration, CMC, Group Dynamics, Social Loafing

Human-AI Collaboration / Decision-Making (2023-)

AI tools can improve decisions, but over-reliance can reduce decision quality. We study and build human-AI interfaces that foster appropriate trust and help people use AI well. The goal: help people and AI make better decisions together.

Keywords: Human-AI Collaboration, AI-Based Decision-Making

VR System for Psychiatric Disorders (2023-)

We are developing a VR system for mental disorders. For example, we aim to measure social cognitive functions related to schizophrenia in a more realistic way using VR.

Keywords: VR, Social Cognition, Psychiatric Disorder

Publication

International Paper

  • Koutaro Kamada, Tzu-Yang Wang, Takaya Yuizono. (2026) Human Misunderstanding of Stated AI Accuracy: Exploring Over- and Under-Reliance through the Lens of Prospect Theory. International Journal of Human-Computer Interaction (Accepted).
  • Koutaro Kamada, Nicharee Manakitrungrueng, Takaya Yuizono. (2025) Simply Incorporating Generative AI into Groups Is Not Enough: Exploring the Effects of Human-AI Collaboration in Groups on Brainstorming. IEICE Transactions on Information and Systems E109-D(No.5) URL
  • Koutaro Kamada, Satoi Shinoda, Mie Matsui, Takaya Yuizono. (2025) A Pilot Study on the Use of Virtual Reality for Assessing Social Cognition. The 20th International Conference on Knowledge, Information and Creativity Support Systems, Extended Abstracts.
  • Koutaro Kamada, Masami Takahashi, Naomi Yamashita. (2025) Exploring Mismatches in Self-Others’ Perceptions of Effort in Videoconferencing, Extended Abstracts of the 2025 CHI Conference on Human Factors in Computing Systems, Article No. 247, pp. 1-7. (Peer-reviewed) PDF
  • Koutaro Kamada, Haruomi Takahashi, Tzu-Yang Wang, Takaya Yuizono. (2025) Exploring the Effect of User Trust in Generative AI on Decision-Making in Semi-Structured Problem. HCI International 2025 (LNCS vol 15771), pp. 237-253, Springer. (Oral, Peer-reviewed, Full paper) PDF
  • Koutaro Kamada, Ryuya Watarai, Tzu-Yang Wang, Kentaro Takashima, Yasuyuki Sumi, Takaya Yuizono. (2023) Explorative study of perceived social loafing in VR group discussion: A comparison between the poster presentation environment and the typical conference environment, INTERACT 2023 (LNCS vol 14144), pp. 115-134, Springer (Aug. 2023). (Oral, Peer-reviewed, Full paper) PDF

Domestic Paper (Japanese), Oral

  • 渡会隆哉, 鎌田光太郎, 角康之, 王子洋, 高島健太郎, 由井薗隆也. (2025) “VR会議における他者との対面量に着目した会議の質の分析”, 情報処理学会論文誌CDS, 15(1), 1-10.
  • 鎌田光太郎, 渡会隆哉, 王子洋, 高島健太郎, 角康之, 由井薗隆也. (2023) “VRグループ・ディスカッションにおける会議形態の違いがターンテイキングに与える影響”, 第200回HIS研究会, 25(3), pp.97–102.
  • 渡会隆哉, 鎌田光太郎, 王子洋, 高島健太郎, 角康之, 由井薗隆也. (2023) “VR会議における他者との対面量に着目した会議の質評価の試み”, DICOMO 2023.（優秀論文賞, 山下記念賞）
  • 羅海洋, 由井薗隆也, 鎌田光太郎, 王子洋. (2023) “感情変化に注目した機械学習による冒険ストーリー生成の試行”, DICOMO 2023.

Domestic Paper (Japanese), Poster / Demo

  • 由井薗隆也, 鎌田光太郎, 東方沙由理, 元山琴菜, 島田淳一, 白肌邦生, 小泉周, 永井由佳里. (2025) 21世紀型トランスファラブルスキルを持つ創造的問題解決人材の存在次元についての考察. 第47回日本創造学会研究大会.
  • 劉牧辰, 松井三枝, 堂本千晶, 由井薗隆也, 鎌田光太郎. (2025) “メタバース・スーパーマーケット場面を利用した日常生活認知機能の測定法”, 認知神経科学会第30回学術集会.
  • 鎌田光太郎, 篠田怜, 松井三枝, 由井薗隆也. (2025) “VRを利用した社会認知機能の測定手法の試作”, インタラクション2025.
  • 劉牧辰, 松井三枝, 堂本千晶, 滝口雄太, 由井薗隆也, 鎌田光太郎. (2024) “メタバースによるショッピング課題の作成と実用可能性の検討”, 「生涯学」領域会議.
  • 渡会隆哉, 鎌田光太郎, 角康之, 王子洋, 由井薗隆也, 高島健太郎. (2024) “VR会議における他者との対面量と言語行動の対応関係の分析”, インタラクション2024.

Funding

  • DC2, JSPS Research Fellowship （selected） Apr. 2026 – Mar. 2028

    To appear

  • JAIST-SPRING, JST Apr. 2024 – Mar. 2027

    Exploring Factors Affecting Trust in AI for AI-Based Decision Making and Proposing Trust Control Methods

Experience

  • Internship (Aug. 2024 - Sep. 2024) — "An investigation of group dynamics in videoconferencing" (Dr. Naomi Yamashita, Ms. Masami Takahashi). Social Informatics Laboratories, NTT R&D.
  • Internship (Sep. 2022 - Feb. 2023) — "Psychological examination" (Prof. Mie Matsui). Laboratory of Neuropsychology, Kanazawa University.
  • Internship (Jul. 2022 - Aug. 2022) — "AR remote collaborative work system using Unity and sensors" (Dr. Mai Otsuki). AIST.
  • LA (Sep. 2023 - Dec. 2023) — ボトムアップ思考とトップダウン思考を区別した創造性支援ツールの基礎研究 (Prof. Takaya Yuizono).
  • LA (Sep. 2023 - Dec. 2023) — ボトムアップ思考を用いた創造技法の基礎研究 (Prof. Takaya Yuizono).
  • TA (2025) — 異分野「超」体験実践Ⅰa, JAIST.
  • TA (2023) — Introduction to Systems Development for Knowledge Science Experiment / Survey (JavaScript/HTML/CSS), JAIST.
  • TA (2023, 2024, 2025) — Introduction to Knowledge Creation, JAIST.
  • RA (2024-2025) — 共創的実践で社会を変革する博士人材育成プログラム… , JAIST.

Contribution