Masafumi Oizumi

Profile Information

Affiliation: Graduate School of Arts and Sciences, The University of Tokyo
: 客員研究員, 和光研究所, 特定国立研究開発法人理化学研究所

Researcher number: 30715371
J-GLOBAL ID: 201101080937111142
researchmap Member ID: B000004828

External link: https://sites.google.com/a/g.ecc.u-tokyo.ac.jp/oizumi-lab/home

東京大学理学部物理学科卒業．
東京大学大学院新領域創成科学研究科岡田真人研究室にて博士取得．
2019年4月より現職．
博士取得後から2017年3月まで，理化学研究所脳科学総合研究センター甘利俊一チームに所属．
2011年10月から2013年10月まで米ウィスコンシン大学 Giulio Tononi研究室に所属．
2015年4月から2016年10月まで豪モナシュ大学土谷尚嗣研究室に所属．
2017年3月から2019年3月まで株式会社アラヤ技術部基礎研究グループに所属．

Research Interests

Research Areas

Research History

Apr, 2019 - Present

The University of Tokyo, Graduate School of Arts and Sciences, Department of General Systems Studies
Mar, 2017 - Mar, 2019

Manager, Basic Research Group, Araya Inc
Apr, 2014 - Feb, 2017

基礎科学特別研究員, 理化学研究所脳科学総合研究センター
Apr, 2015 - Oct, 2016

訪問研究員, School of Psychological Sciences, Monash University
Apr, 2011 - Mar, 2014

日本学術振興会特別研究員(SPD), 理化学研究所脳科学総合研究センター
Oct, 2011 - Oct, 2013

University of Wisconsin
Apr, 2008 - Mar, 2011

Graduate School of Frontier Sciences, The University of Tokyo

Awards

2012

Young Researcher Award, Asian Pacific Neural Network Assembly

Masafumi Oizumi
2010

新領域創成科学研究科研究科長賞（博士）, 東京大学大学院

大泉匡史
2008

研究賞, 日本神経回路学会

大泉匡史
2007

Young Researcher Award, IEEE CIS Japan Chapter

Masafumi Oizumi
2007

新領域創成科学研究科研究科長賞（修士）, 東京大学

大泉匡史
2006

奨励賞, 日本神経回路学会

大泉匡史

Papers

Single-cell resolution functional networks during sleep are segregated into spatially intermixed modules

Daiki Kiyooka, Ikumi Oomoto, Jun Kitazono, Midori Kobayashi, Chie Matsubara, Kenta Kobayashi, Masanori Murayama, Masafumi Oizumi

Sep 15, 2023
Bidirectionally connected cores in a mouse connectome: towards extracting the brain subnetworks essential for consciousness.

Jun Kitazono, Yuma Aoki, Masafumi Oizumi

Cerebral cortex (New York, N.Y. : 1991), Jul 21, 2022
Quantifying brain state transition cost via Schrödinger Bridge.

Genji Kawakita, Shunsuke Kamiya, Shuntaro Sasai, Jun Kitazono, Masafumi Oizumi

Network neuroscience (Cambridge, Mass.), 6(1) 118-134, Feb, 2022
Information flow in the rat thalamo-cortical system: spontaneous vs. stimulus-evoked activities

Kotaro Ishizu, Tomoyo I. Shiramatsu, Rie Hitsuyu, Masafumi Oizumi, Naotsugu Tsuchiya, Hirokazu Takahashi

Scientific Reports, 11(1) 19252-19252, Dec, 2021
Fast, cell-resolution, contiguous-wide two-photon imaging to reveal functional network architectures across multi-modal cortical areas.

Keisuke Ota, Yasuhiro Oisi, Takayuki Suzuki, Muneki Ikeda, Yoshiki Ito, Tsubasa Ito, Hiroyuki Uwamori, Kenta Kobayashi, Midori Kobayashi, Maya Odagawa …

Neuron, 109(11) 1810-1824, Jun 2, 2021
Efficient search for informational cores in complex systems: Application to brain networks.

Jun Kitazono, Ryota Kanai, Masafumi Oizumi

Neural networks : the official journal of the International Neural Network Society, 132 232-244, Aug 28, 2020
Unified framework for the entropy production and the stochastic interaction based on information geometry

Sosuke Ito, Masafumi Oizumi, Shun-ichi Amari

Physical Review Research, 2(3), Jul 9, 2020
A general spectral decomposition of causal influences applied to integrated information.

Dror Cohen, Shuntaro Sasai, Naotsugu Tsuchiya, Masafumi Oizumi

Journal of neuroscience methods, 330 108443-108443, Jan 15, 2020
An Information Theoretic Approach to Reveal the Formation of Shared Representations

Akihiro Eguchi, Takato Horii, Takayuki Nagai, Ryota Kanai, Masafumi Oizumi

Frontiers in Computational Neuroscience, 14 1-1, 2020 Peer-reviewed
Fisher Information and Natural Gradient Learning in Random Deep Networks

Shun-ichi Amari, Ryo Karakida, Masafumi Oizumi

Artificial Intelligence and Statistics (AISTATS), 2019 Peer-reviewed
Information Geometry for Regularized Optimal Transport and Barycenters of Patterns

Shun-ichi Amari, Ryo Karakida, Masafumi Oizumi, Marco Cuturi

Neural Computation, 31(5) 827-848, 2019 Peer-reviewed
Artificial consciousness from the perspective of Integrated Information Theory

Masafumi Oizumi

33(4) 460-467, Jul, 2018
Information Geometry Connecting Wasserstein Distance and Kullback-Leibler Divergence via the Entropy-Relaxed Transportation Problem

Amari S, Karakida R, Oizumi M

Information Geometry, 1(1) 1-25, 2018 Peer-reviewed
Efficient Algorithms for Searching the Minimum Information Partition in Integrated Information Theory.

Jun Kitazono, Ryota Kanai, Masafumi Oizumi

Entropy, 20(3) 173-173, 2018 Peer-reviewed
Fast and exact search for the partition with minimal information loss.

Shohei Hidaka, Masafumi Oizumi

PloS one, 13(9) e0201126, 2018 Peer-reviewed
Conscious perception as integrated information patterns in human electrocorticography

Andrew M. Haun, Masafumi Oizumi, Christopher K. Kovach, Hiroto Kawasaki, Hiroyuki Oya, Matthew A. Howard, Ralph Adolphs, Naotsugu Tsuchiya

eNeuro, 4(5), Sep 1, 2017 Peer-reviewed
Unified framework for information integration based on information geometry

Masafumi Oizumi, Naotsugu Tsuchiya, Shun-ichi Amari

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 113(51) 14817-14822, Dec, 2016 Peer-reviewed
Measuring Integrated Information from the Decoding Perspective

Masafumi Oizumi, Shun-ichi Amari, Toru Yanagawa, Naotaka Fujii, Naotsugu Tsuchiya

PLOS COMPUTATIONAL BIOLOGY, 12(1) e1004654, Jan, 2016 Peer-reviewed
Stimulus Set Meaningfulness and Neurophysiological Differentiation: A Functional Magnetic Resonance Imaging Study

Melanie Boly, Shuntaro Sasai, Olivia Gosseries, Masafumi Oizumi, Adenauer Casali, Marcello Massimini, Giulio Tononi

PLOS ONE, 10(5) e0125337, May, 2015 Peer-reviewed
From the Phenomenology to the Mechanisms of Consciousness: Integrated Information Theory 3.0

Masafumi Oizumi, Larissa Albantakis, Giulio Tononi

PLOS COMPUTATIONAL BIOLOGY, 10(5) e1003588, May, 2014 Peer-reviewed

Misc.

Beyond the "Neural Correlates of Consciousness" : Characterizing the structure of consciousness and information and identifying their relationship

49(3) 319-326, Mar, 2020
Characterization of Neural Network by Integrated Information Theory

木村武龍, 窪田智之, 北園淳, 大泉匡史, 高橋宏知

電気学会研究会資料, (MBE-19-001-012.014-024), 2019
Fisher Information and Natural Gradient Learning of Random Deep Networks

Shun-ichi Amari, Ryo Karakida, Masafumi Oizumi

Aug 22, 2018
Statistical Neurodynamics of Deep Networks: Geometry of Signal Spaces

Shun-ichi Amari, Ryo Karakida, Masafumi Oizumi

Aug 22, 2018
ラット視床-聴皮質間における情報流 : 移動エントロピーによる定量評価—Information transfer between the auditory thalamus & cortex of rats

石津光太郎, 大泉匡史, 土谷尚嗣, 白松(磯口) 知世, 高橋宏知

聴覚研究会資料 = Proceedings of the auditory research meeting, 48(4) 277-282, Jun 30, 2018
Geometry of Information Integration

Shun-ichi Amari, Naotsugu Tsuchiya, Masafumi Oizumi

Sep 7, 2017
シナプス可塑性を組み込んだ相関の理論 (ニューロコンピューティング)

五十嵐康彦, 大泉匡史, 岡田真人

電子情報通信学会技術研究報告, 110(461) 95-100, Mar 7, 2011
25pTD-8 Theory of correlation in a network with short-term synaptic plasticity

Igarashi Yasuhiko, Oizumi Masafumi, Okada Masato

Meeting abstracts of the Physical Society of Japan, 66(1) 290-290, Mar 3, 2011
25pTD-17 Storage capacity of associative memory model with synaptic depression

Otsubo Yosuke, Nagata Kenji, Oizumi Masafumi, Okada Masato

Meeting abstracts of the Physical Society of Japan, 66(1) 292-292, Mar 3, 2011
Storage Capacity of Hopfield Model with Synaptic Depression

OTSUBO Yosuke, NAGATA Kenji, OIZUMI Masafumi, OKADA Masato

IEICE technical report, 110(461) 89-94, Feb 28, 2011
A bounded leaky integrator model can explain variations in reaction time during task switching

Akinori Mitani, Masafumi Oizumi, Ryo Sasaki, Takanori Uka

NEUROSCIENCE RESEARCH, 71 E146-E147, 2011
Difference in odor discrimination between presynaptic and postsynaptic inhibition in the Drosophila olfactory circuit

SATOH Ryota, OIZUMI Masahumi, KAZAMA Hokto, OKADA Masato

IEICE technical report. Neurocomputing, 109(461) 13-18, Mar 2, 2010
20pEA-7 Macroscopic behavior of associative memory model with synaptic depression

Otsubo Yosuke, Nagata Kenji, Oizumi Masafumi, Okada Masato

Meeting abstracts of the Physical Society of Japan, 65(1) 275-275, Mar 1, 2010
20pEA-8 シナプス抑圧を組み込んだ確率的ニューラルネットワークにおける統計力学(20pEA ニューラルネットワーク1(情報統計力学を含む),領域11(統計力学,物性基礎論,応用数学,力学,流体物理))

五十嵐康彦, 大泉匡史, 岡田真人

日本物理学会講演概要集, 65(1), Mar 1, 2010
Theory of correlations in neural network model of V1 with synaptic depression

Yasuhiko Igarashi, Masafumi Oizumi, Masato Okada

NEUROSCIENCE RESEARCH, 68 E73-E73, 2010
Functional difference between global presynaptic and postsynaptic inhibition in the Drosophila olfactory circuit

Masafumi Oizumi, Ryota Satoh, Hokto Kazama, Masato Okada

NEUROSCIENCE RESEARCH, 68 E387-E387, 2010
Statistical mechanics of a Mexican-hat-type network with Depressing Synapses

IGARASHI Yasuhiko, OIZUMI Masafumi, OKADA Masato

IEICE technical report, 109(252) 19-24, Oct 16, 2009
Phase transition in population codes

USUI Yusuke, OIZUMI Masafumi, OKADA Masato

IEICE technical report, 108(480) 135-140, Mar 4, 2009
The significance of a nonlinear transformation and a role of local neurons in the Drosophila primary olfactory center

SATOH Ryota, OIZUMI Masahumi, KAZAMA Hokto, OKADA Masato

IEICE technical report. Neurocomputing, 108(383) 73-78, Jan 12, 2009
The significance of a nonlinear transformation and a role of local neurons in an olfactory circuit

Ryota Satoh, Masafumi Oizumi, Hokto Kazama, Masato Okada

NEUROSCIENCE RESEARCH, 65 S210-S210, 2009

Books and Other Publications

日常と非日常からみるこころと脳の科学

大泉匡史 (Role: Contributor)

コロナ社, Oct, 2017

Presentations

意識の統合情報理論から意識の理論の創り方を考える

大泉匡史

シンギュラリティサロン, 2018 Invited
意識の統合情報理論

大泉匡史

CEDEC (Computer Entertainment Developers Conference), 2018 Invited
脳内ネットワークの情報コアの探索―意識の場所の同定に向けて

大泉匡史

ネットワーク科学セミナー, 2018 Invited
An information theoretic approach to the boundary problem of consciousness

Masafumi Oizumi

2018 Invited
Short lecture on Integrated Information Theory of Consciousness

Masafumi Oizumi

Workshop on Neuroscience of Consciousness: Beyond Neural Correlates of Consciousness, 2017 Invited
Boundary problem of consciousness from the viewpoint of integrated information theory

Masafumi Oizumi

Consciousness Research Network Meeting, 2017 Invited
意識の境界問題に対する情報理論的なアプローチ

大泉匡史

東京理科大学脳学際研究部門第１回公開シンポジウム：脳の理科～脳の謎に挑む, 2017 Invited
A unified framework for quantifying information integration based on information geometry

Masafumi Oizumi

CNS*2016 (Computational Neuroscience) Workhop on Methods of Information Theory in Computational Neuroscience, 2016 Invited
Measures of Consciousness from the Viewpoint of Information Geometry

Masafumi Oizumi

FQXi’s 5th International Conference – If a Tree Falls: the Physics of What Happens and Who is Listening, 2016 Invited
How can we assess "Machine Consciousness"? - From the viewpoint of integrated information theory.

Masafumi Oizumi

13th Japanese-German Frontiers Science Symposium, 2016 Invited
The Integrated Information Theory of Consciousness – Theory and Practice.

Masafumi Oizumi

International Symposium on Neural mechanisms of brain functions that require awareness, 2015 Invited
A Unified Framework for Information Integration Based on Information Geometry

Masafumi Oizumi

2nd Monash Brain Function Workshop, 2015 Invited
Integrated information theory of consciousness.

Tononi G, Koch C, Tsuchiya N, Oizumi M, Albantakis L

Association for the Scientific Study of Consciousness (ASSC), 2014 Invited
The Integrated Information Theory of Consciousness. – Theory and Practice.

Masafumi Oizumi

International Symposium on Memory and Awareness in Anesthesia, 2014 Invited
The integrated information theory of consciousness.

Tononi G, Koch C, Tsuchiya N, Oizumi M

Association for the Scientific Study of Consciousness, 2013 Invited
Quantifying the level of consciousness with integrated information.

Masafumi Oizumi

International Workshop on Measuring Consciousness – Theory and Experiments, 2013 Invited
Measuring the level of consciousness based on the amount of integrated information.

Masafumi Oizumi

Special Neuro Engineering Laboratory Seminar, 2012 Invited
Information loss associated with imperfect observation and mismatched decoding.

Masafumi Oizumi

International Workshop on Information Geometry, 2011 Invited
Consciousness and information integration – Application of the integrated information theory to real neural data.

Masafumi Oizumi

11th Japan-China-Korea Joint Workshop on Neurobiology and Neuroinformatics, 2011 Invited
An information-theoretic approach for investigating to what extent the decoding process in the brain can be simplified.

Masafumi Oizumi

Workshop on Computational Neuroscience, 2010 Invited

Research Projects

Correspondence between qualia structures and information structures

Grants-in-Aid for Scientific Research, Grant-in-Aid for Transformative Research Areas (A), Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2028
Qualia Structure: Establishing super-interdisciplinary research program to bridge a gap between subjective conscious experience and scientific objectivity

Grants-in-Aid for Scientific Research, Grant-in-Aid for Transformative Research Areas (A), Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2028
情報網に潜む因果構造解析と高次元脳計測による意識メータの創出

CREST, JST, Oct, 2018 - Mar, 2024

小村豊
クオリア構造と対応する情報構造の脳活動からの抽出

科学研究費助成事業, 学術変革領域研究(B), 日本学術振興会, Oct, 2020 - Mar, 2023

大泉匡史
Understanding relationships between qualia structures and (brain-derived) information structures

Grants-in-Aid for Scientific Research, Grant-in-Aid for Transformative Research Areas (B), Japan Society for the Promotion of Science, Oct, 2020 - Mar, 2023
脳活動の情報量解析による分離脳のメカニズムの解明

基盤研究(B), 科研費, Apr, 2018 - Mar, 2022

大泉匡史
脳内の情報統合の定量化による意識・無意識の理解と意識レベルの判定

研究助成金, 柏森情報科学振興財団, Jan, 2018 - Dec, 2019

大泉匡史
様々な意識状態に共通して適用可能な意識メーターの開発

若手研究(B), 科研費, Apr, 2014 - Mar, 2017

大泉匡史