Chihiro Nakatani

Received my Ph.D. in Engineering in September 2026. I aim to understand human behavior at the level of groups, not individuals — in video and beyond.

Who forms a group — group detection
What they are doing — group activity representation
Where they look — joint attention estimation

First-author papers at CVPR, ICCV, and CVIU.

Please feel free to reach out via LinkedIn.

LinkedIn → CV Google Scholar →

News

2026/09 Received my Ph.D. in Engineering.
2026/06 Presented papers at CVPR 2026 Findings and the CVPR 2026 Workshop (GAZE 2026).
2026/05 Started a long-term internship as an AI Research Engineer at Sportip (until 2026/07).
2026/04 Awarded the JSPS Research Fellowship for Young Scientists (DC2).
2025/10 Presented a paper at ICCV 2025.
2025/04 Started a research visit at Idiap Research Institute, Switzerland (until 2025/06).

Education

2023/04 – 2026/09

Ph.D in Engineering — Toyota Technological Institute Dissertation: “Group-activity-label-free feature learning with active test-time adaptation for user-intent video retrieval”
Department of Electronics and Information Engineering
On leave 2024/04–2024/09 for a full-time internship at the Hokkaido Nippon-Ham Fighters

2021 – 2023

Master of Engineering — Toyota Technological Institute Graduated at the top of the class

2018 – 2021

Faculty of Engineering — Toyota Technological Institute Early admission to graduate school

– 2018

Asahigaoka High School

Selected Publications

See all publications on Google Scholar →

Awards & Grants

2026

JSPS Research Fellowship for Young Scientists (DC2), 2026/04–2026/09

2025

JST ASPIRE Kyoto Workshop Poster Award

2024

International travel grant — Telecommunications Advancement Foundation

2024

Int'l Conference Research Presentation Award — IEEE Nagoya Branch

2024

International exchange grant — Tateishi Science & Technology Foundation

2023

SICE Outstanding Student Award

2023

Scholarship — Toyoaki Scholarship Foundation, 2023/04–2026/09

2018

Scholarship — Toyota Scholarship Foundation (2018–2021)

Work Experience

Sportip, Inc.

AI Research Engineer

Tokyo, Japan · 2026/05–2026/07 · Full-time internship (on-site)

Playbox

AI Research Engineer

Remote · 2025/10–2026/03 · Part-time · Tech blog

Idiap Research Institute

Visiting Researcher

Martigny, Valais, Switzerland · 2025/04–2025/06 · On-site
🎉 CVPRW 2026 accepted · Study abroad journal (note)

Hokkaido Nippon-Ham Fighters

Sport Analyst

Kitahiroshima, Hokkaido, Japan · 2024/04–2024/09 · Full-time internship (on-site)

OptFit Corporation

Server Side Engineer

Nagoya, Aichi, Japan · 2020/03–2020/08 · Part-time

Activate Data Corporation

Machine Learning Engineer

Remote, 2019 · Part-time

Professional Activities

Reviewer: CVPR 2024 Reviewer: CVPR 2025 Reviewer: CVPR 2026 Reviewer: ICCV 2025 Reviewer: ICMI 2025