Updated on 2026/04/28

写真a

 
KANEKO Takafumi
 
Organization
Academic Assembly Institute of Humanities and Social Sciences KYOIKUGAKU KEIRETU Lecturer
Graduate School of Science and Technology Lecturer
Faculty of Education Living Sciences and Technology Lecturer
Title
Lecturer
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Degree

  • Doctor of Philosophy ( 2017.3   The University of Tokyo )

  • Master of Science ( 2014.3   The University of Tokyo )

  • Bachelor of Science ( 2012.3   The University of Tokyo )

Research Interests

  • data-driven

  • solar flare

  • plasma

  • solar physics

  • magnetic reconnection

  • magnetohydrodynamics

  • coronal mass ejection

  • solar corona

  • prominence

Research Areas

  • Natural Science / Astronomy  / Solar Physics

Research History (researchmap)

  • Lockheed Martin Solar and Astrophysics Laboratory

    2022.4 - 2023.3

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    Country:United States

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  • Niigata University   Faculty of Education, Institute of Humanities and Social Sciences   Lecturer

    2023.4

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  • Niigata University   Graduate School of Science and Technology   Lecturer

    2023.4

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    Notes:兼務

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  • High Altitude Observatory / National Center for Atmospheric Research   Postdoctoral Fellow

    2022.4 - 2023.3

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    Country:United States

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  • Aichi University of Education   Faculty of Education

    2020.5 - 2021.8

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  • Nagoya University   Institute for Space and Earth Environmental Research   Designated Assistant Professor

    2020.4 - 2022.3

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    Country:Japan

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  • Nagoya University   Institute for Space-Earth Environmental Research   Researcher

    2017.4 - 2020.3

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  • The University of Tokyo   Department of Earth and Planetary Science   JSPS Fellow DC2

    2016.4 - 2017.3

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Research History

  • Niigata University   Graduate School of Science and Technology   Lecturer

    2023.4

  • Niigata University   Living Sciences and Technology, Faculty of Education   Lecturer

    2023.4

  • Niigata University   Institute of Humanities and Social Sciences, Academic Assembly   Lecturer

    2023.4

Education

  • The University of Tokyo   School of Science   Department of Earth and Planetary Science PhD Course

    2014.4 - 2017.3

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  • The University of Tokyo   School of Science   Department of Earth and Planetary Science Master Course

    2012.4 - 2014.3

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  • The University of Tokyo   School of Science   Department of Earth and Planetary Physics

    2008.4 - 2012.3

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Professional Memberships

  • The Japan Society of Technology Education

    2026.1

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  • Society of Geomagnetism and Earth, Planetary and Space Sciences

    2025.9

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  • American Astronomical Society

    2022.5

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  • JAPAN GEOSCIENCE UNION

    2012.4

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  • THE ASTRONOMICAL SOCIETY OF JAPAN

    2012.4

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Committee Memberships

  • Japan Geoscience Union   Publicity and Outreach Committee  

    2023.12   

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    Committee type:Academic society

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Papers

  • Conditions for Solar Prominence Formation Triggered by Single Localized Heating Reviewed

    Takero Yoshihisa, Takaaki Yokoyama, Takafumi Kaneko

    The Astrophysical Journal   978 ( 1 )   94 - 94   2024.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    Abstract

    We performed numerical simulations to study mechanisms of solar prominence formation triggered by a single heating event. In the widely accepted “chromospheric-evaporation condensation” model, localized heating at footpoints of a coronal loop drives plasma evaporation and eventually triggers condensation. The occurrence of condensation is strongly influenced by the characteristics of the heating. Various theoretical studies have been conducted along one-dimensional field lines with quasi-steady localized heating. The quasi-steady heating is regarded as the collection of multiple heating events among multiple strands constituting a coronal loop. However, it is reasonable to consider a single heating event along a single field line as an elemental unit. We investigated the condensation phenomenon triggered by a single heating event using 1.5-dimensional magnetohydrodynamic simulations. By varying the magnitude of the localized heating rate, we explored the conditions necessary for condensation. We found that, when a heating rate approximately ~10<sup>4</sup> times greater than that of steady heating was applied, condensation occurred. Condensation was observed when the thermal conduction efficiency in the loop became lower than the cooling efficiency, with the cooling rate significantly exceeding the heating rate. Using the loop length L and the Field length λ <sub>F</sub>, the condition for condensation is expressed as λ <sub>F</sub> ≲ L/2 under conditions where cooling exceeds heating. We extended the analytically derived condition for thermal nonequilibrium to a formulation based on heating amount.

    DOI: 10.3847/1538-4357/ad9908

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    Other Link: https://iopscience.iop.org/article/10.3847/1538-4357/ad9908/pdf

  • Data-driven MHD Simulation of the Formation of a Magnetic Flux Rope and an Inclined Solar Eruption Reviewed

    Yeongmin Kang, Takafumi Kaneko, K. D. Leka, Kanya Kusano

    The Astrophysical Journal   974 ( 2 )   168 - 168   2024.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    Abstract

    Solar energetic events are caused by the release of magnetic energy accumulated in the solar atmosphere. To understand their initiating physical mechanisms, the dynamics of the coronal magnetic fields must be studied. Unfortunately, the dominant mechanisms are still unclear due to a lack of direct measurements. Numerical simulations based on magnetohydrodynamics (MHD) can reproduce the dynamical evolution of solar coronal magnetic field, providing a useful tool to explore flare initiation. Data-driven MHD simulations, in which the time-series observational data of the photospheric magnetic field is used as the simulation boundary condition, can explore different mechanisms. To investigate the accumulation of free magnetic energy through a solar eruption, we simulated the first of several large flares in NOAA active region 11283. We used a data-driven model that was governed by zero-beta MHD, focusing on the free magnetic energy accumulation prior to the M5.3 flare (2011 September 6 at 01:59 UT). We reproduced the flare-associated eruption following the formation of twisted magnetic fields, or a magnetic flux rope (MFR), formed by photospheric motions at its footpoints. We found that the eruption was first triggered by the growth of the torus instability. The erupting MFR caused magnetic reconnections with neighboring magnetic field lines located along the direction of the eruption. Using the simulation results and an axial-radial decay index centered on the MFR, we find a natural explanation for the inclination of the eruption and a possible approach to predict the direction of solar eruptive events.

    DOI: 10.3847/1538-4357/ad6a54

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    Other Link: https://iopscience.iop.org/article/10.3847/1538-4357/ad6a54/pdf

  • Characteristics of the Accelerated Electrons Moving along the Loop Derived from Cyclical Microwave Brightenings at the Footpoints Reviewed

    Keitarou Matsumoto, Satoshi Masuda, Takafumi Kaneko

    The Astrophysical Journal Letters   955 ( 2 )   L39 - L39   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    Abstract

    Many particles are accelerated during solar flares. To understand the acceleration and propagation processes of electrons, we require the pitch-angle distributions of the particles. The pitch angle of accelerated electrons has been estimated from the propagation velocity of a nonthermal microwave source archived in Nobeyama Radioheliograph data. We analyzed a flare event (an M-class flare on 2014 October 22) showing cyclical microwave brightenings at the two footpoint regions. Assuming that the brightenings were caused by the accelerated electrons, we approximated the velocity parallel to the magnetic field of the accelerated electrons as ∼7.7 × 10<sup>4</sup> and 9.0 × 10<sup>4</sup> km s <sup>−1</sup>. The estimated pitch angle of the accelerated electrons is 69°–80° and the size of the loss cone at the footpoint (estimated from the magnetic field strength in the nonlinear force-free field model) is approximately 43°. Most of the accelerated electrons could be reflected at the footpoint region. This feature can be interpreted as brightenings produced by bouncing motion of the accelerated electrons.

    DOI: 10.3847/2041-8213/acf99c

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    Other Link: https://iopscience.iop.org/article/10.3847/2041-8213/acf99c/pdf

  • Impact of subsurface convective flows on the formation of sunspot magnetic field and energy build-up Reviewed

    Takafumi Kaneko, Hideyuki Hotta, Shin Toriumi, Kanya Kusano

    Monthly Notices of the Royal Astronomical Society   517 ( 2 )   2775 - 2786   2022.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstarct

    Strong solar flares occur in δ-spots characterized by the opposite-polarity magnetic fluxes in a single penumbra. Sunspot formation via flux emergence from the convection zone to the photosphere can be strongly affected by convective turbulent flows. It has not yet been shown how crucial convective flows are for the formation of δ-spots. The aim of this study is to reveal the impact of convective flows in the convection zone on the formation and evolution of sunspot magnetic fields. We simulated the emergence and transport of magnetic flux tubes in the convection zone using radiative magnetohydrodynamics code R2D2. We carried out 93 simulations by allocating the twisted flux tubes to different positions in the convection zone. As a result, both δ-type and β-type magnetic distributions were reproduced only by the differences in the convective flows surrounding the flux tubes. The δ-spots were formed by the collision of positive and negative magnetic fluxes on the photosphere. The unipolar and bipolar rotations of the δ-spots were driven by magnetic twist and writhe, transporting magnetic helicity from the convection zone to the corona. We detected a strong correlation between the distribution of the nonpotential magnetic field in the photosphere and the position of the downflow plume in the convection zone. The correlation could be detected 20–30 h before the flux emergence. The results suggest that high free energy regions in the photosphere can be predicted even before the magnetic flux appears in the photosphere by detecting the downflow profile in the convection zone.

    DOI: 10.1093/mnras/stac2635

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  • Data-driven MHD Simulation of Successive Solar Plasma Eruptions Reviewed

    Takafumi Kaneko, Park Sung-Hong, Kanya Kusano

    The Astrophysical Journal   909 ( 2 )   155   2021.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3847/1538-4357/abe414

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  • Impact of Dynamic State on the Mass Condensation Rate of Solar Prominences Reviewed

    Takafumi Kaneko

    The Astrophysical Journal   869 ( 2 )   136   2018.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3847/1538-4357/aaee6f

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  • Reconnection-Condensation Model for Solar Prominence Formation Reviewed

    Takafumi Kaneko, Takaaki Yokoyama

    Astrophysical Journal   845 ( 1 )   12   2017.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Physics Publishing  

    DOI: 10.3847/1538-4357/aa7d59

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  • APPARENT CROSS-FIELD SUPERSLOW PROPAGATION OF MAGNETOHYDRODYNAMIC WAVES IN SOLAR PLASMAS Reviewed

    T. Kaneko, M. Goossens, R. Soler, J. Terradas, T. Van Doorsselaere, T. Yokoyama, A. N. Wright

    The Astrophysical Journal   812 ( 2 )   121   2015.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0004-637X/812/2/121

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  • NUMERICAL STUDY ON IN SITU PROMINENCE FORMATION BY RADIATIVE CONDENSATION IN THE SOLAR CORONA Reviewed

    T. Kaneko, T. Yokoyama

    The Astrophysical Journal   806 ( 1 )   115   2015.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0004-637X/806/1/115

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  • SIMULATION STUDY OF SOLAR PLASMA ERUPTIONS CAUSED BY INTERACTIONS BETWEEN EMERGING FLUX AND CORONAL ARCADE FIELDS Reviewed

    Takafumi Kaneko, Takaaki Yokoyama

    The Astrophysical Journal   796 ( 1 )   44   2014.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0004-637X/796/1/44

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MISC

Presentations

  • 観測データ駆動MHDシミュレーションによる太陽フレア予測可能性の検証

    金子岳史

    ISEE合同研究集会「太陽地球圏環境予測のためのモデル研究の展望」「STEシミュレーション研究会:プラズマ科学とデータ駆動科学の協調」  2026.3 

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    Event date: 2026.3

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  • Statistical relationship between subsurface convective flows and the magnetic energy build-up in sunspots Invited

    Takafumi Kaneko

    USO GOLDEN JUBILEE INTERNATIONAL CONFERENCE  2026.2 

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    Event date: 2026.2

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  • Morphological evolution of solar prominences due to interchange instability in helical flux rope

    Takafumi Kaneko

    EAMA11 (The 11th East-Asian Meeting on Astronomy)  2025.12 

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    Event date: 2025.12

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  • Feasibility Study of Solar Flare Prediction Using Observational Data-driven MHD Simulations

    T. Kaneko

    SGEPSS 2025  2025.11 

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    Event date: 2025.11

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  • Conditions for Solar Prominence Formation Triggered by Single Localized Heating

    Takero Yoshihisa, Takaaki Yokoyama, Takafumi Kaneko

    Waves and Instabilities in the Solar Atmosphere (WISA)  2025.9 

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    Event date: 2025.9

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  • Prominence splitting and merging due to interchange instability in helical flux rope

    Takafumi Kaneko

    JpGU 2025 (Japan Geoscience Union Meeting 2025)  2025.5 

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    Event date: 2025.5

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  • Accelerating Nonlinear Heat Conduction Simulations in High-Temperature Regions Using Deep Learning

    Y. Koseki, T. Kaneko, Y. Iida

    JpGU 2025 (Japan Geoscience Union Meeting 2025)  2025.5 

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    Event date: 2025.5

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  • Data-driven MHD simulation of sigmoid formation in the puzzling NOAA active region 12665

    Yeongmin Kang, K. D. Leka, Denis Pavel Cabezas, Takafumi Kaneko, Kanya Kusano

    ISEE Symposium Frontier of Space-Earth Environmental Research as Predictive Science  2025.3 

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    Event date: 2025.3

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  • 深層学習を用いた表面磁気パターンからの黒点出現予測

    福原亮, 飯田佑輔, 金子岳史

    2024年度 電子情報通信学会 信越支部大会  2024.9 

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    Event date: 2024.9

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  • Data-driven MHD simulation of an inclined solar eruption in NOAA active region 11283

    Yeongmin Kang, Takafumi Kaneko, K. D. Leka, Kanya Kusano

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    Event date: 2023.12

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  • Impact of subsurface convective flows on the formation of sunspot magnetic field and energy build-up

    T. Kaneko, H.Hotta, S. Toriumi, K. Kusano

    Hinode-16/IRIS-13  2023.9 

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    Event date: 2023.9

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  • Impact of Convective Flows on Energy Build-up of Flare-productive Sunspots Invited

    Takafumi Kaneko, Hideyuki Hotta, Shin Toriumi, Kanya Kusano

    ASTRONUM 2023  2023.6 

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    Event date: 2023.6

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  • Impact of subsurface convective flows on the formation of sunspot magnetic field and energy build-up

    T. Kaneko, H. Hotta, S. Toriumi, K. Kusano

    Triennial Earth-Sun Summit (TESS) 2022  2022.8 

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    Event date: 2022.8

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  • Prominence splitting and merging due to interchange instability in helical flux rope

    Takafumi Kaneko

    ISEE Symposium Frontier of Space-Earth Environmental Research as Predictive Science  2025.3 

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  • Impact of subsurface convective flows on the formation of sunspot magnetic field and energy build-up

    T. Kaneko

    2023.3 

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  • 活動領域12887で発生したXクラスフレアの観測データ駆動型磁気流体シミュレーション

    金子岳史, 草野完也

    日本天文学会2022年春季年会  2022.3 

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  • 太陽内部対流が黒点形成・進化へ与える影響

    金子岳史, 草野完也, 堀田英之, 鳥海森

    日本天文学会2021年秋季年会  2021.9 

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  • Test particle simulation of high energy electrons during solar flare

    T.Kaneko, S.Takasao

    JpGU 2021  2021.6 

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  • Data-driven MHD simulation of successive solar plasma eruptions

    T. Kaneko, S.-H. Park, K.Kusano

    JpGU 2021  2021.6 

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  • 黒点形成・進化に伴う太陽フレアの磁気流体シミュレーション

    金子岳史, 堀田英之, 草野完也

    日本地球惑星科学連合 2021年大会  2021.6 

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  • 太陽フレアにおける高エネルギー電子加速のテスト粒子計算

    金子岳史

    2020年度ISEE研究集会 「太陽地球圏環境予測のためのモデル研究の展望」  2021.3 

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  • 太陽対流層-コロナ連結磁気流体シミュレーションによる超巨大フレア発生条件解明の展望

    金子岳史, 草野完也, 堀田英之

    日本天文学会2021年春季年会  2021.3 

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  • 太陽ミニフィラメント噴出の観測データ駆動型磁気流体シミュレーション

    金子岳史, S-H. Park, 草野完也

    日本流体力学会年会2020  2020.9 

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  • Data-driven MHD simulation of minifilament eruption

    T. Kaneko, S-H. Park, K. Kusano

    日本天文学会2020年秋季年会  2020.9 

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  • 太陽プロミネンス噴出の磁気流体シミュレーション

    金子岳史, 草野完也

    第4回PSTEPモデル研究会  2019.12 

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  • 太陽プラズマ噴出を対象とした観測データ駆動型磁気流体シミュレーション

    金子岳史, Sung-Hong Park, 草野完也

    研究集会「宇宙地球環境の理解に向けての統計数理的アプローチ」  2019.12 

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  • 太陽プロミネンス乱流の磁気流体シミュレーション

    金子岳史, 横山央明, 草野完也

    第36回 プラズマ核融合学会  2019.11 

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  • Evolution of dynamic internal structure of prominence in reconnection-condensation scenario Invited International conference

    Takafumi Kaneko

    3rd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP 2019)  2019.11 

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  • PhoENiX性能評価に向けた熱的高温プラズマの直接数値計算 Invited

    金子岳史

    宇宙プラズマにおける粒子加速ワークショップ2019前期  2019.8 

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  • Apparent Cross-field Superslow Propagation of Magnetohydrodynamic Waves in a Flux Rope Hosting Prominence Invited International conference

    Takafumi Kaneko

    AOGS2019  2019.7 

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  • Simulation study on internal velocity field variation of eruptive prominence Invited

    Takafumi Kaneko

    JpGU2019  2019.5 

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  • Internal velocity field variation of prominence before eruption

    T.Kaneko, K.Kusano

    Flux Emergence Workshop 2019  2019.3 

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  • 噴出型プロミネンス内の速度場変化と磁場の関係性

    金子岳史

    日本天文学会2019年春季年会  2019.3 

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  • 降着円盤の蒸発・凝縮に関する熱伝導を考慮した磁気流体数値実験:STS法の有効性

    金子岳史

    ブラックホール降着流ミニワークショップ  2019.3 

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  • 噴出型プロミネンス内部速度場の数値モデリング

    金子岳史

    2018年度太陽研連シンポジウム  2019.2 

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  • プロミネンス形成・噴出の3次元磁気流体シミュレーション

    金子岳史

    飛騨天文台50周年記念ミニ研究会  2018.11 

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  • プロミネンス噴出の3次元磁気流体シミュレーション

    金子岳史, 草野完也

    日本天文学会2018年秋季年会  2018.9 

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  • 降着円盤の蒸発・凝縮に関する熱伝導を考慮した2次元磁気流体数値実験

    金子岳史, 中村賢仁, 横山央明

    日本天文学会2018年秋季年会  2018.9 

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  • Numerical Modeling of Prominence Formation from Reconnection to Radiative Condensation, Invited International conference

    Takafumi Kaneko

    COSPAR2018  2018.7 

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  • Two-dimensional MHD Simulation for Prominence Eruption with Radiative Condensation International conference

    Takafumi Kaneko

    COSPAR2018  2018.7 

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  • Reconnection-Condensation Model for Solar Prominence Formation Invited International conference

    Takafumi Kaneko

    ASTRONUM2018  2018.6 

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  • プロミネンス形成及び噴出の2次元磁気流体シミュレーション

    金子岳史, 草野完也

    日本天文学会2018年春季年会  2018.3 

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  • プロミネンスへの運動量凝縮と噴出メカニズムへの影響

    金子岳史, 草野完也

    2017年度太陽研連シンポジウム  2018.2 

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  • 磁気流体シミュレーションによる太陽プロミネンス噴出の研究

    金子岳史

    平成29年度CfCAユーザーズミーティング  2017.11 

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  • プロミネンスの質量凝縮率に対するRayleigh-Taylor不安定の影響

    金子岳史, 横山央明

    日本天文学会2017年秋季年会  2017.9 

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  • 太陽プロミネンスの質量凝縮率に対するRayleigh-Taylor不安定の影響

    金子岳史, 横山央明

    日本流体力学会年会2017  2017.8 

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  • Numerical Study of Prominence Formation: Reconnection-Condensation Model Invited International conference

    Takafumi Kaneko

    JpGU-AGU Joint Meeting 2017  2017.5 

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  • プロミネンス形成の数値的研究

    金子岳史, 横山央明

    2016年度太陽研究者連絡会シンポジウム  2017.2 

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  • 太陽プロミネンス形成の3次元磁気流体シミュレーション:リコネクション凝縮モデル

    金子岳史, 横山央明

    日本流体力学会年会2016  2016.9 

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  • 放射凝縮による太陽プロミネンス形成の3次元MHDシミュレーション

    金子岳史, 横山央明

    日本天文学会2016年秋季年会  2016.9 

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  • Numerical Study on Prominence Formation: Reconnection-Condensation Model

    T.Kaneko, T.Yokoyama

    2016.9 

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  • Three-dimensional MHD Simulation of Prominence Formation by Radiative Condensation

    T.Kaneko, T.Yokoyama

    2016.6 

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  • Cross-field superslow propagation by phase-mixing of Alfven/slow mode wave in the solar corona

    T.Kaneko, M.Goossens, R.Soler, J.Terradas, T. van Doorsselaere, T.Yokoyama, A. N. Wrigh

    日本地球惑星科学連合2016年大会  2016.5 

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  • 位相混合による見かけの波を用いたコロナ磁場診断の可能性

    金子岳史, 横山央明

    2015年度太陽研連シンポジウム  2016.2 

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  • 太陽プロミネンス内部の位相混合による見かけの波の磁気流体シミュレーション

    金子岳史, 横山央明

    平成27年度CfCAユーザーズミーティング  2016.1 

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  • Apparent cross-field superslow propagation in coronal magnetic structures

    T. Kaneko

    2015.12 

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  • Numerical Study of In-Situ Prominence Formation by Radiative Condensation

    T.Kaneko, T.Yokoyama

    Hinode-9  2015.9 

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  • Cross-field superslow propagation by continuum Alfven/slow magnetosonic wave

    T. Kaneko, T. Yokoyama, M. Goossens, T. van Doorsselaere, R. Soler, J. Terradas

    日本天文学会2015年秋季年会  2015.9 

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  • Apparent Slow Propagation Across Magnetic Surfaces

    M. Goossens, T. Kaneko, R. Soler, J. Terradas, T. van Doorsselaere

    AOGS 2015  2015.8 

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  • Mechanism of In-situ Formation of Solar Prominence and Power Law Relationship Between Temperature and Density

    T. Kaneko, T. Yokoyama, R .Keppens

    AOGS 2015  2015.8 

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  • Process for triggering in-situ prominence formation inside flux rope associated with footpoint motion or flux emergence

    T .Kaneko, T.Yokoyama

    Flux Emergence Workshop 2015  2015.6 

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  • プロミネンスからコロナキャビティに渡って成り立つ温度-密度間の冪乗則

    金子岳史, 横山央明

    2015.5 

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  • 放射凝縮により形成されるプロミネンスの温度-密度間の羃乗則

    金子岳史, 横山央明, Rony Keppens

    日本天文学会2015年春季年会  2015.3 

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  • プロミネンスとキャビティを結ぶ冪乗則

    金子岳史, 横山央明, Rony Keppens

    2014年度太陽研連シンポジウム  2015.2 

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  • Two-dimensional MHD Simulations of Solar Filament Formation by Radiative Condensation

    T.Kaneko, T.Yokoyama

    AOGS 2014  2014.7 

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  • New Model for Solar Filament Formation and Demonstration by MHD Simulations

    T.Kaneko, T.Yokoyama

    ASTRONUM 2014  2014.6 

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  • Two-dimensional MHD Simulation of Filament Formation by Radiative Condensation

    T. Kaneko, T. Yokoyama

    Magnetic Reconnection 2014  2014.5 

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  • 放射凝縮による太陽フィラメント形成の2.5次元MHDシミュレーション

    金子岳史, 横山央明

    日本地球惑星科学連合2014年大会  2014.4 

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  • 熱不安定により励起されるフィラメント内の波動の解析

    金子岳史, 横山央明

    日本天文学会2014年春季年会  2014.3 

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  • 放射凝縮による太陽フィラメント形成の2.5次元シミュレーション

    金子岳史, 横山央明

    磁気リコネクションと太陽プラズマ研究会  2014.3 

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  • 放射冷却-凝縮過程によるフィラメント形成の2.5次元シミュレーション

    金子岳史, 横山央明

    名古屋大学STE研共同研究集会「太陽彩層・彩層磁場の多角的観測と宇宙天気研究」 太陽研連シンポジウム「活動極大期を迎えた太陽研究の新たな展開、彩層プラズマ診断、宇宙天 気、Solar-C」  2014.2 

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  • 熱不安定による太陽フィラメント形成の2.5次元シミュレーション

    金子岳史, 横山央明

    第26回理論懇シンポジウム  2013.12 

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  • MHD Simulation of Plasma Eruption by Interaction between Emerging Flux and Coronal Arcade Field

    T.Kaneko, T.Yokoyama

    MHD Simulation of Plasma Eruption by Interaction between Emerging Flux and Coronal Arcade Field  2013.11 

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  • MHD Simulation of Filament Formation by Thermal Instability

    T.Kaneko, T.Yokoyama

    Hinode-7  2013.11 

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  • 熱不安定による太陽フィラメント形成の2.5次元シミュレーション

    金子岳史, 横山央明

    日本流体力学会年会2013  2013.9 

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  • 熱不安定による太陽フィラメント形成の2.5次元MHDシミュレーション

    金子岳史, 横山央明

    日本天文学会2013年秋季年会  2013.9 

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  • Simulation Study of Solar Eruptions Associated with Interaction between Newly Emerging Flux and Coronal Arcade Field

    T.Kaneko, T.Yokoyama

    12th Asia Pacific Physics Conference  2013.7 

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  • Simulation Study of Solar Plasma Eruption by Interaction between Emerging Flux and Coronal Arcade Field

    T. Kaneko, T. Yokoyama

    JpGU 2013  2013.4 

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  • 浮上磁場出現に伴うプラズマ放出現象のコロナアーケード磁場シア角依存性

    金子岳史, 横山央明

    第15回ひので-実験室研究会  2013.2 

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  • 太陽浮上磁場-アーケード磁場相互作用によるプラズマ放出機構とパラメータ ー依存性

    金子岳史, 横山央明

    平成24年度太陽研連シンポジウム  2013.2 

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  • 太陽浮上磁場-コロナアーケード磁場相互作用によるプラズマ放出の発生条件

    金子岳史, 横山央明

    第25回理論懇シンポジウム  2012.12 

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  • 太陽浮上磁場出現に伴うプラズマ放出発生条件の2.5次元シミュレーシ ョンによるパラメーター解析

    金子岳史, 横山央明

    平成24年度CfCAユーザーズミーティング  2012.12 

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  • 太陽浮上磁場出現に伴うプラズマ放出現象の2.5次元シミュレーション

    金子岳史, 横山央明

    日本天文学会2012年秋季年会  2012.9 

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  • 日本流体力学会年会2012

    金子岳史, 横山央明

    日本流体力学会年会2012  2012.9 

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Awards

  • Student Presentation Award in JpGU

    2014.5   Japan Geoscience Union  

    Takafumi Kaneko

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Research Projects

  • Theoretical studies on evolution of stellar coronae

    Grant number:21H01124

    2021.4 - 2024.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

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    Authorship:Coinvestigator(s) 

    Grant amount:\17680000 ( Direct Cost: \13600000 、 Indirect Cost:\4080000 )

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  • Magnetohydrodynamic simulation study on solar prominence turbulence associated with magnetic destabilization

    Grant number:20K14519

    2020.4 - 2026.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Early-Career Scientists

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\3380000 ( Direct Cost: \2600000 、 Indirect Cost:\780000 )

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  • 磁気流体シミュレーションと観測の比較による太陽プロミネンス形成メカニズムの解明

    Grant number:16J06780

    2016.4 - 2018.3

    System name:科学研究費助成事業 特別研究員奨励費

    Research category:特別研究員奨励費

    Awarding organization:日本学術振興会

    金子 岳史

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    Grant amount:\1700000 ( Direct Cost: \1700000 )

    本年度は計画通り3次元シミュレーションコードの開発及び新たな太陽プロミネンス形成モデルの実証を行った。太陽プロミネンスとはコロナ内に出現する低温高密度プラズマ雲である。プロミネンスはコロナの基本的な構造の一つであるが、その形成機構は明らかになっていない。本研究では新たなプロミネンス形成モデル「リコネクション凝縮モデル」を提案し、シミュレーションにより実証した。通常、コロナは熱伝導により熱的に安定に保たれているが、熱伝導が効かなくなると放射冷却により不安定化し、暴走的な低温化及び凝縮が起こると考えられている。本研究では、磁気リコネクションによって形成される閉じた磁場構造(磁束菅)が局所的に熱伝導の効かない領域になりうる点に着目し、磁気リコネクションが熱不安定を励起できるかを3次元磁気流体シミュレーションにより検証した。
    本研究で実施するシミュレーションではコロナの熱伝導を効率良く解く必要があった。これを達成するために最新の時間積分手法であるSuper TimeStepping法を実装した3次元磁気流体シミュレーションコードを開発し、大幅な計算時間の短縮に成功した。シミュレーションの結果、磁気リコネクション発生後にコロナプラズマが凝縮し、プロミネンスへと成長していく過程が再現された。特に、実際にプロミネンスが形成される際に観測される多波長間の放射強度遷移を、シミュレーション結果を元にした擬似観測(太陽観測衛星SDOの極紫外線フィルターを用いた)により確認した。これにより、本研究の目的であったリコネクション凝縮モデルの実証は達成された。さらに、太陽観測衛星ひのでなどで観測されているプロミネンス内部の動的内部構造も本モデルで再現可能であることを確認した。研究成果は国際学会IRIS-6及びHinode-10で発表した。現在査読付き論文を準備中である。

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  • Research of generation mechanisms and dynamics of solar magnetic fields

    Grant number:23340042

    2011.4 - 2015.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    YOKOYAMA Takaaki, TORIUMI Shin, HOTTA Hideyuki, IIJIMA Haruhisa, KANEKO Takafumi, WANG Shuoyang, MATSUI Yuki, KITAGAWA Naomasa

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    Grant amount:\5200000 ( Direct Cost: \4000000 、 Indirect Cost:\1200000 )

    We studied the generation mechanisms and the dynamics of the solar magnetic fields by means of the numerical simulations. By the computations with our own code including the reduced-speed-of-sound technique on the RIKEN ``K''-system, we succeeded to obtain a new knowledge on the global-scale solar magnetic convection in the solar interior. The small-scale downflows generated in the near-surface layer penetrate into deeper layers and excite small-scale turbulence. A small-scale dynamo action is generated there. We also clarify the mechanisms to maintain the near surface shear layer in the sun, which was a remained puzzle of the solar rotation profile. It is maintained by the balance between the transports of angular momentum by the turbulence and the meridional circulation. In addition to these, we found that there is a strong feed-back from the magnetic field generated by the small-scale dynamo by the turbulence toward the large-scale thermal transport.

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Other research activities

  • 2025年度 教育実習 出向指導

    2025.9

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  • 2024年度 教育実習 出向指導

    2024.9

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Teaching Experience (researchmap)

  • Pedagogy in Technical Teaching I

    2026.4
    Institution name:Faculty of Education, Niigata University

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  • Computer and Information Science IV

    2025.10
    Institution name:Faculty of Education, Niigata University

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  • Programming for Students II

    2025.6
    Institution name:Niigata University, Faculty of Education

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  • Programming for Students I

    2025.4
    Institution name:Faculty of Education, Niigata University

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  • Fundamental Practice of Information II

    2025.4
    Institution name:Faculty of Education, Niigata University

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  • Computer and Information Science III

    2025.4
    Institution name:Faculty of Education, Niigata University

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  • Frontiers of quantum research

    2025.4

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  • X-informatics

    2025.4
    Institution name:Graduate School of Science and Technology, Niigata University

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  • 卒業研究

    2024.10
    Institution name:新潟大学 教育学部

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  • 情報科学II

    2024.10
    Institution name:新潟大学 教育学部

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  • 情報実習I

    2024.10
    Institution name:新潟大学 教育学部

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  • 学問の扉 知と方法の最前線

    2024.10
    -
    2025.3

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  • Introduction to Data Science II

    2024.6

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  • Introduction to Data Science

    2024.4
    Institution name:Graduate School of Science and Technology, Niigata University

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  • Advanced Numerical Computation

    2024.4
    Institution name:Graduate School of Science and Technology, Niigata University

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  • Basics in Information and Communication Technology for University Students I

    2024.4
    -
    2025.8
    Institution name:Faculty of Education, Niigata University

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  • Basics in Information and Communication Technology for University Students II

    2024.4
    -
    2025.8
    Institution name:Faculty of Education, Niigata University

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  • Fundamentals of Information

    2023.10
    Institution name:Faculty of Education, Niigata Univ.

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  • Introduction to Data Science I

    2023.10

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  • 入門教育実習

    2023.4
    Institution name:新潟大学 教育学部

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  • Computer and Information Science I

    2023.4
    Institution name:Faculty of Education, Niigata University

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  • Exercise in Environmental Earth Science

    2021.4
    -
    2021.9

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  • Exercise in Environmental Earth Science

    2020.5
    -
    2020.10

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Teaching Experience

  • 技術教育学I

    2026
    Institution name:新潟大学

  • ライフ・イノベーションPBL(M)

    2026
    Institution name:新潟大学

  • 機械及び実習

    2026
    Institution name:新潟大学

  • 技術教育学II

    2026
    Institution name:新潟大学

  • X-informatics概論

    2025
    Institution name:新潟大学

  • 情報科学IV

    2025
    Institution name:新潟大学

  • 情報実習II

    2025
    Institution name:新潟大学

  • 情報科学III

    2025
    Institution name:新潟大学

  • 量子研究の最前線

    2025
    Institution name:新潟大学

  • プログラミング教育論II

    2025
    Institution name:新潟大学

  • プログラミング教育論I

    2025
    Institution name:新潟大学

  • 卒業研究

    2024
    Institution name:新潟大学

  • 情報通信技術教育論II

    2024
    Institution name:新潟大学

  • 数値計算特論

    2024
    Institution name:新潟大学

  • 情報通信技術教育論I

    2024
    Institution name:新潟大学

  • 情報実習I

    2024
    Institution name:新潟大学

  • 情報科学II

    2024
    Institution name:新潟大学

  • データサイエンス概論

    2024
    Institution name:新潟大学

  • データサイエンス総論II

    2024
    Institution name:新潟大学

  • 学問の扉 知と方法の最前線

    2024
    Institution name:新潟大学

  • 情報科学I

    2023
    Institution name:新潟大学

  • データサイエンス総論I

    2023
    Institution name:新潟大学

  • 情報基礎及び実習

    2023
    Institution name:新潟大学

  • 情報基礎I

    2023
    Institution name:新潟大学

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Social Activities

  • 令和7年度 新潟大学附属長岡中学校 教育研究協議会

    Role(s): Advisor

    新潟大学附属長岡中学校  2025.11

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  • 令和6年度 新潟大学附属長岡中学校 教育研究協議会

    Role(s): Advisor

    新潟大学附属長岡中学校  2024.11

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Academic Activities

  • 審査員, SGEPSS Student Presentation Award

    Role(s): Review, evaluation

    地球電磁気・地球惑星圏学会  2025.11

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    Type:Scientific advice/Review 

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  • LOC, ISEE研究集会「情報科学との融合による太陽圏物理学の新展開 2025」

    Role(s): Planning, management, etc.

    名古屋大学 宇宙地球環境研究所, 新潟大学  2025.8

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    Type:Academic society, research group, etc. 

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  • LOC, Hinode-11/IRIS-13

    Role(s): Planning, management, etc.

    National Astronomical Observatory of Japan  2023.9

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    Type:Academic society, research group, etc. 

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