Chihiro Nakatani

Ph.D student at Toyota Technological Institute, working with Prof. Norimichi Ukita at IIM Lab. Publishing first-author papers at top-tier venues including CVPR and ICCV.

On the job market — Fall 2026

Please feel free to reach out.

Email LinkedIn → CV Google Scholar →
Group Activity Understanding Action Recognition AI in Sports Embodied AI
Chihiro Nakatani

Education

2024/10 – Present
Ph.D in Engineering — Toyota Technological Institute Department of Electronics and Information Engineering
2025/04 – 2025/06
Visiting Researcher — Idiap Research Institute
2024/04 – 2024/09
Analyst (Long-term Internship) — Hokkaido Nippon-Ham Fighters
2023/04 – 2024/03
Ph.D in Engineering — Toyota Technological Institute
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

Publications

CVPR 2026 Findings
Group-DINOmics: Incorporating People Dynamics into DINO for Self-supervised Group Activity Feature Learning
Ryuki Tezuka, Chihiro Nakatani, Norimichi Ukita
Proc. of IEEE Conference on Computer Vision & Pattern Recognition, June 2026.
CVIU 2026
Human-in-the-loop Adaptation in Group Activity Feature Learning for Team Sports Video Retrieval
Chihiro Nakatani, Hiroaki Kawashima, Norimichi Ukita
Computer Vision and Image Understanding, vol.263, pp. 104577, 2026. Special issue on "Computer Vision for Sports and Winter Sports".
ICCV 2025
Dynamic Group Detection using VLM-augmented Temporal Groupness Graph
Kaname Yokoyama, Chihiro Nakatani, Norimichi Ukita
Proc. of IEEE International Conference on Computer Vision, Oct. 2025. (acceptance rate = 24.0%)
CVPR 2024
Learning Group Activity Features Through Person Attribute Prediction
Chihiro Nakatani, Hiroaki Kawashima, Norimichi Ukita
Proc. of IEEE Conference on Computer Vision & Pattern Recognition, June 2024. (acceptance rate = 23.6%)
ICCV 2023
Interaction-aware Joint Attention Estimation Using People Attributes
Chihiro Nakatani, Hiroaki Kawashima, Norimichi Ukita
Proc. of IEEE International Conference on Computer Vision, Oct. 2023. (acceptance rate = 26.15%)
See all publications on Google Scholar →

Awards & Grants

2026
JSPS Research Fellowship for Young Scientists (DC2)
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 (2023–2026)
2018
Scholarship — Toyota Scholarship Foundation (2018–2021)

Work Experience

Playbox

Machine Learning Engineer
Remote, 2025 · Tech blog

Hokkaido Nippon-Ham Fighters

Analyst
Hokkaido, Japan · 2024/04–2024/09 · Long-term internship

OptFit Corporation

Server Side Engineer
Remote, 2020 · 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