About Me
自己紹介
I am a Ph.D. student at the Sakurai & Matsubara Lab in SANKEN, Osaka University. I am working on data mining using machine learning, particularly interested in time-series analysis through dynamical systems.
大阪大学産業科学研究所内の櫻井・松原研究室所属のPh.D. studentです。 機械学習を用いたデータマイニングに取り組んでおり、特に動的システムを用いた時系列解析に興味を持っています。
Email: r-fujiwr88☏sanken.osaka-u.ac.jp (Please replace ☏ with @)
Publications
論文一覧
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[C5]
When to Retrain after Drift: A Data-Only Test of Post-Drift Data Size Sufficiency
Ren Fujiwara, Yasuko Matsubara, and Yasushi Sakurai
ICLR 2026 (acceptance rate: 28.1%)
[ paper | slides | code and datasets | bib ] -
[C4]
Multi-Aspect Mining and Anomaly Detection for Heterogeneous Tensor Streams
Soshi Kakio, Yasuko Matsubara, Ren Fujiwara, and Yasushi Sakurai
WebConf 2026 (acceptance rate: 20.1%)
[ paper | slides | code and datasets | bib ] -
[C3]
Modeling Latent Non-Linear Dynamical System over Time Series
Ren Fujiwara, Yasuko Matsubara and Yasushi Sakurai
AAAI 2025, selected as oral presentation (acceptance rate: 4.6%; overall acceptance rate: 23.4%)
[ paper | slides | code and datasets | bib ] -
[C2]
Modeling Time-evolving Causality over Data Streams
Naoki Chihara, Yasuko Matsubara, Ren Fujiwara, and Yasushi Sakurai
KDD 2025, (acceptance rate: 19%)
[ paper | slides | code and datasets | bib ] -
[C1]
C-Cast: A Real-Time Forecasting Model for a Controlled Sequence
Ren Fujiwara, Yasuko Matsubara and Yasushi Sakurai
CIKM 2022 (PhD Symposium)
[ paper | bib ]
Education
略歴
- 2024/4 - present JSPS research fellow, DC2, Supervisor: Prof. Yasushi Sakurai
- 2023/4 - present Ph.D student, Graduate School of Information Science and Technology, Information Systems Engineering, Osaka University.
- 2021/4 - 2023/3 Master's student, Graduate School of Information Science and Technology, Information Systems Engineering, Osaka University.
- 2017/4 - 2021/3 Bachelor's student, Department of Information and Computer Sciences, School of Engineering Science, Osaka University.
- 2024/4 - 現在 日本学術振興会特別研究員 DC2
- 2023/4 - 現在 大阪大学大学院 情報科学研究科 情報システム工学専攻 博士後期課程.
- 2021/4 - 2023/3 大阪大学大学院 情報科学研究科 情報システム工学専攻 博士前期課程 修了.
- 2021/8 - 現在 大阪大学産業科学研究所 特任研究員
- 2017/4 - 2021/3 大阪大学 基礎工学部 情報科学科 卒業.
- 2013/4 - 2016/3 大阪府立高津高等学校 文理学科 卒業.
Awards/Grants
受賞/研究資金
- 2023/4 - 2024/3 Osaka University fellowship for cross-disciplinary innovation
- 2023/7 Japan Student Services Organization (JASSO) Student Loan, Exemption
- 2022/10 SIGIR student travel grants for CIKM 2022
- 2024/3 DEIM2024 優秀論文賞
- 2023/4 - 2024/3 分野横断イノベーションを創造する情報人材育成フェローシップ
- 2023/7 JASSO 特に優れた業績による返還免除
- 2023/3 DEIM2023 学生プレゼンテーション賞
- 2022/10 SIGIR student travel grants for CIKM 2022