Akifumi OKUNO

Profile Information

Affiliation: Assistant Professor, Department of Fundamental Statistical Mathematics, Statistical Decision-Making Group, The Institute of Statistical Mathematics
: (Concurrent)Assistant Professor, School of Statistical Thinking
: (Concurrent)Assistant Professor, Risk Analysis Research Center
: Visiting Scientist, Center for Advanced Intelligence Project, RIKEN
: (Concurrent)Visiting Scientist, Center for Brain Science
: Assistant Professor, Statistical Science Program, The Graduate University for Advanced Studies

Degree: Doctor of Informatics(Sep, 2020, Graduate School of Informatics, Kyoto University)

Contact information: okunoism.ac.jp
Researcher number: 40897972
ORCID iD: https://orcid.org/0000-0001-9621-8853
J-GLOBAL ID: 202001000316875030
researchmap Member ID: R000010190

External link: https://okuno.net/

Please see https://www.youtube.com/@oao6215 for my talk videos.

Research Areas

Research Interests

Major Research History

Mar, 2024 - Present

Assistant Professor, Department of Fundamental Statistical Mathematics, Statistical Decision-Making Group, The Institute of Statistical Mathematics
Oct, 2020 - Present

Visiting Scientist, Center for Advanced Intelligence Project, RIKEN
Oct, 2020 - Present

Assistant Professor, School of Statistical Thinking, The Institute of Statistical Mathematics
Apr, 2019 - Sep, 2020

Technical Staff I, Center for Advanced Intelligence Project, RIKEN
Apr, 2017 - Mar, 2019

Research Fellow (DC2), Japan Society for the Promotion of Science

Professional Memberships

Jul, 2021 - Present

The Japan Statistical Society

Major Papers

A systematic approach to decomposing numerical turbulence fields into substructures

Akifumi Okuno, Makoto Sasaki

Physics of Plasmas, 32(3) 032502, Mar 1, 2025 Peer-reviewed
Outlier-Robust Neural Network Training: Efficient Optimization of Transformed Trimmed Loss with Variation Regularization

Akifumi Okuno, Shotaro Yagishita

CoRR, abs/2308.02293, Oct, 2024 Lead authorCorresponding author
Minimizing robust density power-based divergences for general parametric density models

Akifumi Okuno

Annals of the Institute of Statistical Mathematics, 76(5) 851-875, May, 2024 Peer-reviewedLead authorLast authorCorresponding author
An interpretable neural network-based non-proportional odds model for ordinal regression

Akifumi Okuno, Kazuharu Harada

Journal of Computational and Graphical Statistics, 2024 Peer-reviewedLead authorCorresponding author
Minimax Analysis for Inverse Risk in Nonparametric Planer Invertible Regression

Akifumi Okuno, Masaaki Imaizumi

Electronic Journal of Statistics, 18(1) 355-394, 2024 Peer-reviewedLead author
A generalization gap estimation for overparameterized models via the Langevin functional variance

Akifumi Okuno, Keisuke Yano

Journal of Computational and Graphical Statistics, 32(4) 1287-1295, Apr, 2023 Lead authorCorresponding author
Finding r-II Sibling Stars in the Milky Way with the Greedy Optimistic Clustering Algorithm

Kohei Hattori, Akifumi Okuno, Ian U. Roederer

The Astrophysical Journal, 946(1) 48-48, Mar, 2023
Extrapolation Towards Imaginary 0-Nearest Neighbour and Its Improved Convergence Rate.

Akifumi Okuno, Hidetoshi Shimodaira

Advances in Neural Information Processing Systems, 33 21889-21899, 2020 Peer-reviewedLead authorCorresponding author
Graph Embedding with Shifted Inner Product Similarity and Its Improved Approximation Capability.

Akifumi Okuno, Geewook Kim, Hidetoshi Shimodaira

Proceedings of Machine Learning Research (AISTATS2019), 89 644-653, 2019 Peer-reviewedLead authorCorresponding author
A probabilistic framework for multi-view feature learning with many-to-many associations via neural networks.

Akifumi Okuno, Tetsuya Hada, Hidetoshi Shimodaira

Proceedings of Machine Learning Research (ICML2018), 80 3885-3894, 2018 Peer-reviewedLead authorCorresponding author

Major Research Projects

複雑な予測モデルの厳密な事後分布計算手法の確立とその応用

科学研究費助成事業, 基盤研究(B), 日本学術振興会, Apr, 2025 - Mar, 2029

奥野彰文, 深作亮也, 高畠哲也
属性付き関係データ解析のための予測モデルの検討と不確実性評価法の構築

科学研究費助成事業, 若手研究, 日本学術振興会, Apr, 2021 - Mar, 2025

奥野彰文

Major Awards

Jun, 2024

Ogawa Research Award, Japan Statistical Society
Nov, 2023

優秀プレゼンテーション賞, 一般の確率モデルに対するロバストダイバージェンスの最小化, 第26回情報論的学習理論ワークショップ (IBIS 2023)

奥野彰文
Nov, 2019

優秀プレゼンテーション賞, ノンパラメトリックなリンク回帰とその理論的性質について, 第22回情報論的学習理論ワークショップ (IBIS 2019)

奥野彰文, 矢野恵佑, 下平英寿

Major Misc.

予測モデルの可逆性について

奥野彰文

日本統計学会誌（小川研究奨励賞特別寄稿論文）, 54(2) 205-220, Mar, 2025 Peer-reviewedInvitedLead authorLast authorCorresponding author

Works

歪正規Quiz

奥野彰文

Jul 20, 2024 - Present Software
R package sgdpd

Akifumi Okuno

Jan 22, 2024 - Present Software

Major Presentations

（予定）正規性を仮定しない分布推定

奥野彰文

日本地球惑星科学連合 (JpGU) 2025年大会, May 26, 2025 Invited
一人の手法研究者から見た科学応用研究

奥野彰文

情報論的学習理論ワークショップ (IBIS), Nov 5, 2024 Invited
Outlier-Robust Neural Network Training: Efficient Optimization of Transformed Trimmed Loss with Variation Regularization

奥野彰文, 柳下翔太郎

Kyoto Information and Society Seminar (KISS), Oct 8, 2024 Invited
楽観的なクラスタリングと天文学への応用

奥野彰文

第2回MfIP連携探索ワークショップ, Sep 17, 2024 Invited
冪密度ダイバージェンスの最小化およびそのパッケージ化の近況

奥野彰文

ベイズ統計サマーシンポジウム, Sep 12, 2024 Invited
Estimation with integral-based loss functions

Akifumi Okuno

International Symposium on Recent Advances in Theories and Methodologies for Large Complex Data, Dec, 2023 Invited
Extrapolation Towards Imaginary 0-Nearest Neighbour and Its Improved Convergence Rate

Akifumi Okuno, Hidetoshi Shimodaira

NeurIPS meetup in Japan, Dec, 2020 Invited
Graph Embedding with Shifted Inner Product Similarity and Its Improved Approximation Capability

Akifumi Okuno

Workshop on Functional Inference and Machine Intelligence, Mar, 2018 Invited

Education

Apr, 2017 - Mar, 2019

Department of Systems Science, Graduate School of Informatics, Kyoto University
Apr, 2016 - Mar, 2017

Department of Systems Innovation Division of Mathematical Science, Graduate School of Engineering Science, Osaka University
Apr, 2014 - Mar, 2016

Department of Systems Innovation Division of Mathematical Science, Graduate School of Engineering Science, Osaka University
Apr, 2010 - Mar, 2014

Information Science, Department of Engineering Science, Osaka University

Major Academic Activities

計算技術による学際的統計解析ワークショップ：主催

Planning, management, etc.

奥野彰文 (統計数理研究所), Feb 17, 2025 - Feb 18, 2025
日本統計関連学会連合大会企画セッション「次世代エネルギー核融合研究における統計的アプローチ」：主催

Planning, management, etc.

三分一史和，横山雅之，奥野彰文 (東京理科大学神楽坂キャンパス), Sep 2, 2024
Symbolic Neural Learning Workshop 2024：PC委員

Planning, management, etc.

(日本科学未来館), Jun 26, 2024 - Jun 27, 2024
第25回情報論的学習理論ワークショップ（IBIS2022）チュートリアル担当委員長

Planning, management, etc.

(つくば国際会議場), Nov 23, 2022

Social Activities

講演「統計学とは何か？」

Lecturer

統計数理研究所, 高校生訪問プログラム, Aug 19, 2024
講演「Physics Informed Neural Network の数理的な検討と効率的な計算について」

Lecturer

データサイエンス研究会, Mar 22, 2024
講演「中高時代と現在について」

Panelist, Official expert

立命館中学高等学校, 第15回科学教育の国際化を考えるシンポジウム, Feb 19, 2024
講演「君たちはどう研究するか？」

Panelist

2023年度機械学習ワークショップ, 若手交流企画, Oct 28, 2023

Other

セミナー講師：専門家による実践的な統計解析ウェビナー「Stataで学ぶ共分散構造分析／構造方程式モデリング」

Feb, 2025 - Present

https://www.lightstone.co.jp/webinar/special4.html
外部講師による研究セミナー企画・運営

Mar, 2024 - Present

https://okuno.net/lab/seminars

Profile Information

Research Areas

Research Interests

Major Research History

Professional Memberships

Major Papers

Major Research Projects

Major Awards

Major Misc.

Works

Major Presentations

Education

Major Academic Activities

Social Activities

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