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Masahiro Fujisawa
藤澤　将広
Masahiro Fujisawa
藤澤　将広
Graduate School of Information Science and Technology　Department of Information Systems Engineering, Assistant Professor

keyword Statistical Machine Learning

Research History 7

  1. 2025/03 - Present
    Osaka University　Graduate School of Information Science and Technology, Department of Information Systems Engineering　Assistant Professor

  2. 2025/03 - Present
    RIKEN　Center for Advanced Intelligence Project, Structured Learning Team　Visiting Scientist

  3. 2023/04 - 2025/02
    RIKEN　Center for Advanced Intelligence Project, Imperfect Information Learning Team　Special Postdoctoral Researchers Program

  4. 2024/07 - 2025/01
    University of Oxford　Visiting Researcher

  5. 2021/10 - 2023/03
    The University of Tokyo

  6. 2021/04 - 2023/03
    Japan Society for the Promotion of Science　JSPS Research Fellow (DC2)

  7. 2020/04 - 2021/03
    RIKEN　RIKEN Center for Advanced Intelligence Project　RIKEN Junior Research Associate

Research Areas 2

  1. Informatics / Statistical science /

  2. Informatics / Intelligent informatics / Machine Learning

Awards 9

  1. RIKEN BAIHO Award

    Futoshi Futami, Masahiro Fujisawa　RIKEN　2025/03

  2. 学生最優秀プレゼンテーション賞

    越塚毅, 藤澤将広, 田中佑典, 佐藤一誠　電子情報通信学会 情報論的学習理論と機械学習研究会　2023/12

  3. Dean’s Award for Outstanding Achievement (Doctoral Program)

    Masahiro Fujisawa　The University of Tokyo　2023/03

  4. Outstanding Reviewer Award (top 10% of reviewers)

    Masahiro Fujisawa　The Thirty-Ninth International Conference on Machine Learning (ICML2022)　2022/07

  5. 優秀プレゼンテーション賞

    藤澤 将広, 手嶋 毅志, 佐藤 一誠, 杉山 将　電子情報通信学会 情報論的学習理論と機械学習研究会　2022/03

  6. Outstanding Reviewer Award (top 8% of reviewers)

    Masahiro Fujisawa　Thirty-Fifth Annual Conference on Neural Information Processing Systems (NeurIPS2021)　2021/12

  7. 新領域創成科学研究科長賞（修士）

    藤澤将広　国立大学法人 東京大学　2020/03

  8. 分析部門奨励賞

    藤澤将広　日本統計学会スポーツ統計分科会　2018/03

  9. 同志社総長賞

    後藤智紀, 藤澤将広　学校法人 同志社　2017/03

Papers 7

  1. Fixing the Pitfalls of Probabilistic Time-Series Forecasting Evaluation by Kernel Quadrature

    Masaki Adachi, Masahiro Fujisawa, Michael A Osborne

    First International Conference on Probabilistic Numerics (ProbNum25)　2025/05/16　Research paper (international conference proceedings)

  2. PAC-Bayes Analysis for Recalibration in Classification

    Masahiro Fujisawa, Futoshi Futami

    Proceedings of The 42nd International Conference on Machine Learning (ICML2025)　2025/05/01　Research paper (international conference proceedings)

  3. Information-theoretic Generalization Analysis for Expected Calibration Error

    Futoshi Futami, Masahiro Fujisawa

    Thirty-Eighth Conference on Neural Information Processing Systems (NeurIPS2024); to appear　2024/05/24　Research paper (international conference proceedings)

  4. Time-Independent Information-Theoretic Generalization Bounds for SGLD

    Futoshi Futami, Masahiro Fujisawa

    Thirty-seventh Conference on Neural Information Processing Systems (NeurIPS2023); to appear　2023/11　Research paper (international conference proceedings)

  5. Understanding the Expressivity and Trainability of Fourier Neural Operator: A Mean-Field Perspective

    Takeshi Koshizuka, Masahiro Fujisawa, Yusuke Tanaka, Issei Sato

    Thirty-Eighth Conference on Neural Information Processing Systems (NeurIPS2024); to appear　2023/10/10　Research paper (international conference proceedings)

  6. Multilevel Monte Carlo Variational Inference

    Masahiro Fujisawa, Issei Sato

    Journal of Machine Learning Research　Vol. 22　No. 278　p. 1-44　2021/12/01　Research paper (scientific journal)

    Publisher: Microtome Publishing

  7. γ-ABC: Outlier-Robust Approximate Bayesian Computation Based on a Robust Divergence Estimator.

    Masahiro Fujisawa, Takeshi Teshima, Issei Sato, Masashi Sugiyama

    Proceedings of The 24th International Conference on Artificial Intelligence and Statistics　Vol. 130　p. 1783-1791　2021　Research paper (international conference proceedings)

    Publisher: PMLR

Misc. 4

  1. Flight trajectory modeling reveals species-specific obstacle avoidance policies in echolocating bats

    Yu Teshima, Shoko Genda, Yota Aoki, Masahiro Fujisawa, Shizuko Hiryu, Keisuke Fujii

    bioRxiv　2025/06/18　Internal/External technical report, pre-print, etc.

  2. Information-theoretic Generalization Analysis for VQ-VAEs: A Role of Latent Variables

    Futoshi Futami, Masahiro Fujisawa

    2025/05/26

  3. Scalable Valuation of Human Feedback through Provably Robust Model Alignment

    Masahiro Fujisawa, Masaki Adachi, Michael A. Osborne

    2025/05/23

  4. Information-theoretic generalization analysis for vector-quantized VAEs.

    Futoshi Futami, Masahiro Fujisawa

    Machine Learning and Compression Workshop at NeurIPS 2024　2024/12　Internal/External technical report, pre-print, etc.

Presentations 4

  1. キャリブレーションのための汎化解析

    藤澤将広

    ワークショップ 関数空間論に基づく深層学習の理論と応用　2025/03/28

  2. Generalization Analysis for Calibration

    Masahiro Fujisawa

    University of Oxford Seminar Series　2024/11

  3. γ-ABC: Outlier-robust approximate Bayesian computation based on a robust divergence estimator

    Masahiro Fujisawa

    The satellite event of BayesComp2023: “Bayesian computing without exact likelihoods”　2023/03

  4. モンテカルロ変分推論における勾配分散抑制について

    藤澤将広

    NTT コミュニケーション科学研究所 セミナーシリーズ　2018/10

Academic Activities 9

  1. AISTATS2025 Reviewer

    The 28th International Conference on Artificial Intelligence and Statistics

    2025 -

  2. ICLR2025 Reviewer

    Thirteenth International Conference on Learning Representations

    2025 -

  3. ICML2025 Reviewer

    Forty-Second International Conference on Machine Learning

    2025 -

  4. ICLR2024 Reviewer

    The Twelfth International Conference on Learning Representations

    2024 -

  5. NeurIPS2024 Reviewer

    Thirty-Eighth Annual Conference on Neural Information Processing Systems

    2024 -

  6. Annals of Statistics Reviewer

    Institute of Mathematical Statistics

    2023 -

  7. ICML2022 Reviewer

    Thirty-Ninth International Conference on Machine Learning

    2022 -

  8. NeurIPS2021 Reviewer

    Thirty-Fifth Annual Conference on Neural Information Processing Systems

    2021 -

  9. NeurIPS2020 Reviewer

    Thirty-Fourth Annual Conference on Neural Information Processing Systems

    2020 -