CV

Education

Ph.D in Physics, Tohoku University, 2004/03
M.S. in Physics, Tohoku University, 2001/03
B.S. in Physics, Tohoku University, 1999/03

Work experience

2025/04 to present: Principal Research Scientist
- Okinawa Institute of Science and Technology
- Duties included: Own research
2026/06 to present: Senior Visiting Researcher
- Research Center for Advanced Science and Technology, The University of Tokyo, Japan
- Duties included: Mars camera project
2026/04 to present: Visiting Professor
- National Institute of Polar Research, Japan
- Duties included: PI of AJ1007 Antarctic program
2023/04 to present: External Associate Professor
- The University of Tokyo, Japan
- Duties included: Teaching
2013/07 to 2025/03: Associate Professor
- National Institute of Polar Research, Japan
- Duties included: PIs and teaching (SOKENADAI)
2009/08~2013/06: Assistant Professor
- Tokyo Institute of Technology, Japan
- Duties included: Research on mass extinction
2007/04~2009/07: Special Postdoctoral Researcher
- RIKEN, Japan
- Duties included: Own research (MHD code development)
- Supervisor: Dr. Toshikazu Ebisuzaki
2004/04~2007/03: JSPS Postoctoral Researcher
- NICT, NASA/GSFC, and Nagoya University
- Duties included: Own research (space weather)
- Supervisor: Prof. Takashi Kikuchi
2001/04~2004/03: JSPS DC1 Researcher
- Tohoku University
- Duties included: Own research (dayside aurora)
- Supervisor: Prof. Hiroshi Fukunishi
2000/07~2000/09: Visiting Researcher
- Bell Labs, Lucent Technologies
- Supervisor: Dr. Louis Lanzerotti
1999/09~1999/11: Visiting Researcher
- Bell Labs, Lucent Technologies
- Supervisor: Dr. Louis Lanzerotti

Awards

2026/06: Excellence in Refereeing, GRL, AGU
2024/05: Tanakadate Award, SGEPSS
2016/04: Excellence in Refereeing, GRL, AGU
2015/04: The MEXT Young Scientists’ Prize
2011/09: Excellence in Refereeing, Space Weather, AGU
2009/09: Obayashi Award, SGEPSS
2004/03: President’s Award, Tohoku University
1999/12: Outstanding Student Paper Award, AGU Fall Meeting

Recent Publications (listed ater 2023 only)

The list of publications before 2023 is here (PDF file)

Patterns of relativistic electron precipitation observed by REPTile-2/CIRBE: comparison with CALET/ISS and MAXI/ISS

Mei et al. (2026). "Patterns of relativistic electron precipitation observed by REPTile-2/CIRBE: comparison with CALET/ISS and MAXI/ISS" JGR Space Physics, submitted.

Estimation of auroral emission altitude in the region of the ISS magnetic footprint during a relativistic electron precipitation event observed by ISS-CALET

Yanagisawa, K., Kataoka, R., Seki, K. et al. (2026). "Estimation of auroral emission altitude in the region of the ISS magnetic footprint during a relativistic electron precipitation event observed by ISS-CALET" Earth, Planets and Space, 78, 205.

fac sachin

Reddy, S. A., Kataoka, R. et al. (2026). "FAC model" Wiley journal, submitted.

REP texas

Mei et al. (2026). "REP " JGR Space Physics, submitted.

Faint red auroras as seen from Japan associatedwith intense magnetospheric compression

Nakayama, T., and R. Kataoka (2026). "Faint aurora as seen from Japan associated with intense magnetospheric compression " J. Space Weather Space Clim., 16, 19.

Multipoint spacecraft measurements of an ICME structure in October 2021: From the solar surface to the inner heliosphere

Bamba, Y., Hara, T., Kataoka, R., Marubashi, K., Iwai, K., Hori, T., et al. (2026). "Multipoint spacecraft measurements of an ICME structure in October 2021: From the solar surface to the inner heliosphere" Journal of Geophysical Research: Space Physics. 131, e2025JA034744.

Compact all-sky auroral imager using multi band-pass filter and full-color sensor

Kataoka, R., Sato, Y., Hampton, D. et al. (2026). "Compact all-sky auroral imager using multi band-pass filter and full-color sensor" Earth Planets Space, 78(70).

Extremely Active Sun from 1190 to 1220 in the Medieval Period: Intercomparison of Historical Records and Tree-ring Carbon-14

Miyahara, H., et al. (2026). "Extremely Active Sun from 1190 to 1220 in the Medieval Period: Intercomparison of Historical Records and Tree-ring Carbon-14" Proceedings of the Japan Academy, Ser. B, 102, 4, 156-166.

Estimation of Global increase of radiation dose rates during the ground level enhancement on 11–12 November 2025 using WASAVIES

Sato, T., Shiota, D., Kubo, Y., Kataoka, R., Yasuda, H., Miyake, S., et al. (2026). "Estimation of Global increase of radiation dose rates during the ground level enhancement on 11–12 November 2025 using WASAVIES" Space Weather, 24, e2026SW004949.

LLBL

Tanaka et al. (2026). "Origin and structure of the LLBL elucidated by the global simulation " JGR Space Physics, submitted.

CGBM microburst

Kurihara et al. (2026). "microburst " GRL, submitted.

SMRAI substorm

Nilam, B. et al. (2026). "SMRAI substorm" JSWSC. submitted

Real time monitoring of the rigidity spectrum of large Forbush decreases in May and October 2024 with the paired neutron monitor and muon detector at the Antarctic Syowa Station

Hayashi, Y., et al. (2026). "Real time monitoring of the rigidity spectrum of large Forbush decreases in May and October 2024 with the paired neutron monitor and muon detector at the Antarctic Syowa Station" Earth, Planets and Space, 78(75).

chorus-driven REP

Arai, et al. (2026). "chorus-driven REP" GRL, submitted.

Charge-sign dependent drift effects in the time-lag of cosmic-ray variation relative to solar activity observed with CALET

Adriani, O., et al., CALET collaboration (2026). "Charge-sign dependent drift effects in the time-lag of cosmic-ray variation relative to solar activity observed with CALET" Progress of Theoretical and Experimental Physics, ptag025.

Ultra-high-precision measurements of carbon-14 and its application for space weather and space climate research

Miyahara, H., et al. (2026). "Ultra-high-precision measurements of carbon-14 and its application for space weather and space climate research" Philosophical Transactions of the Royal Society A, accepted.

Effects of the May 2024 Solar Storm on the Earth’s Radiation Belts Observed by CALET on the International Space Station

Ficklin, A. et al. (2026). "Effects of the May 2024 Solar Storm on the Earth's Radiation Belts Observed by CALET on the International Space Station" Geophysical Review Letters. 53, e2025GL120032

Chorus ISS

Yanagisawa, K., et al. (2026). "Chorus ISS" EPS, submitted.

Climatology of Pi2 pulsations deduced from the Wp index

Nakano, S., Kataoka, R., and Nose (2025). "Climatology of Pi2 pulsations deduced from the Wp index" Journal of Geophysical Research: Space Physics, 130, e2025JA034345.

Data assimilation into a machine learning-based emulator of a global MHD simulation for analyzing the polar ionosphere

Nakano, S., Reddy, S. A., Kataoka, R., Nakamizo, A., Fujita, S., and Yukimatu, A. S. (2025). "Data assimilation into a machine learning-based emulator of a global MHD simulation for analyzing the polar ionosphere" Space Weather,23, e2025SW004488

Data publication activities for the Global Muon Detector Network (GMDN)

Kozai, M., Y. Hayashi, C. Kato, K. Munakata, N. Miyashita, R. Kataoka, S. Miyake, and A. Kadokura (2025). "Data publication activities for the Global Muon Detector Network (GMDN)" Proceedings of Science. 501, ICRC2025

Roles of plasma sheet flow, plasma sheet dissipation and the M-I coupling in reproducing the substorm with the global simulation

Tanaka et al. (2025). "Roles of plasma sheet flow, plasma sheet dissipation and the M-I coupling in reproducing the substorm with the global simulation" JGR Space Physics. 130, e2024JA033606.

Precision Spectral Measurements of Chronium and Titanium from 10 to 250 GeV/n and Sub-Iron to Iron Ratio with the Calorimetric Electron Telescope on the International Space Station

Adriani, O. et al. (CALET Collaboration) (2025). "Precision Spectral Measurements of Chronium and Titanium from 10 to 250 GeV/n and Sub-Iron to Iron Ratio with the Calorimetric Electron Telescope on the International Space Station" Physical Review Letters. 135, 021002.

Exploring outer radiation belt losses from the International Space Station

Zhang, X.-J., Artemyev, A., Katoh, Y., Hsieh, Y., Angelopoulos, V., Torii, S., et al. (2025). "Exploring outer radiation belt losses from the International Space Station" Geophysical Research Letters. 52, e2025GL116966.

Ground-based Observations of Temporal Variation of Cosmic Ray Spectrum during Forbush Decreases

Mitthumsiri, W. et al. (2025). "Ground-based Observations of Temporal Variation of Cosmic Ray Spectrum during Forbush Decreases" ApJL, 986, L7.

Atmospheric ionization caused by EMIC-wave driven energetic electron precipitation at auroral latitude

Murase, K., Kataoka, R., Tanaka, Y., Nishiyama, T., Hashimoto, T., & Sato, K. (2025). "Atmospheric ionization caused by EMIC-wave driven energetic electron precipitation at auroral latitude" Geophysical Research Letters. 52, e2024GL114248.

Extended red aurora associated with super substorm igniting the October 10, 2024 magnetic storm as revealed by citizen science

Kataoka, R. et al. (2025). "Extended red aurora associated with super substorm igniting the October 10, 2024 magnetic storm as revealed by citizen science" Earth, Planets and Space. 77, 64

Radiation-Belt Dropouts: Relationship with Geomagnetic Storms and MeV Precipitation

Freund, D., Blum, L., Huang, J., Vidal-Luengo, S., Bruno, A., & Kataoka, R. (2025). "Radiation-Belt Dropouts: Relationship with Geomagnetic Storms and MeV Precipitation" GRL, 52, e2024GL113660.

Rigidity spectrum and its solar cycle variation of the north-south anisotropy in galactic cosmic-rays observed by ground-based muon detectors

Kozai, M., Y. Hayashi, K. Fujii, K. Munakata, C. Kato, N. Miyashita, A. Kadokura, R. Kataoka, S. Miyake, M. L. Duldig, J. E. Humble, and K. Iwai (2024). "Rigidity spectrum and its solar cycle variation of the north-south anisotropy in galactic cosmic-rays observed by ground-based muon detectors" ApJ. 977, 160.

Extended magenta aurora as revealed by citizen science

Kataoka R., S. A. Reddy, S. Nakano, J. Pettit, and Y. Nakamura (2024). "Extended magenta aurora as revealed by citizen science" Scientific Report. 15, 25849.

Global analysis of the extended cosmic-ray decreases observed with world-wide networks of neutron monitors and muon detectors; temporal variation of the rigidity spectrum and its implication

Munakata et al. (2024). "Global analysis of the extended cosmic-ray decreases observed with world-wide networks of neutron monitors and muon detectors; temporal variation of the rigidity spectrum and its implication" ApJ. 974, 283.

MeV Electron Precipitation during Radiation Belt Dropouts

Freund, D., Blum, L., Vidal-Luengo, S., Bruno, A., & Kataoka, R. (2024). "MeV Electron Precipitation during Radiation Belt Dropouts" Journal of Geophysical Research: Space Physics. 129, e2024JA032759.

Formation mechanism of fingers that protrude eastward from the Io plasma disk during the interchange instability

Tanaka, T., Ebihara, Y., Watanabe, M., Fujita, S., & Kataoka, R. (2024). "Formation mechanism of fingers that protrude eastward from the Io plasma disk during the interchange instability" Journal of Geophysical Research: Space Physics. 129, e2024JA032559

Exceptionally gigantic aurora in the polar cap on a day when the solar wind almost disappeared

Hosokawa, K., R. Kataoka, T. T. Tsuda, Y. Ogawa, Y. Zhang, and L. J. Paxton (2024). "Exceptionally gigantic aurora in the polar cap on a day when the solar wind almost disappeared" Science Advances. 10, 25.

Magnetic Storm-Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High-Density Solar Wind

Kataoka, R., Miyoshi, Y., Shiokawa, K., Nishitani, N., Keika, K., Amano, T., & Seki, K. (2024). "Magnetic storm-time red aurora as seen from Hokkaido, Japan on 1 December 2023 associated with high-density solar wind" Geophysical Research Letters. 51, e2024GL108778.

Comparative Observations of the Outer Belt Electron Fluxes and Precipitated Relativistic Electrons

Vidal-Luengo, S. E., Blum, L. W., Bruno, A., Guzik, T. G., de Nolfo, G., Ficklin, A. W., et al. (2024). "Comparative observations of the outer belt electron fluxes and precipitated relativistic electrons" Geophysical Research Letters. 51, e2024GL109673.

Thermospheric nitric oxide energy budget during extreme geomagnetic storms: a comparative study

Bag T, Kataoka R, Ogawa Y, Fujiwara H, Li Z, Singh V, Sivakumar V, Sridharan S, Pirnaris P and Tourgaidis T (2024). "Thermospheric nitric oxide energy budget during extreme geomagnetic storms: a comparative study " Front. Astron. Space Sci.. 11:1273079.

Multiple convection cells induced by in‐front and off‐front interactions between the obliquely northward IMF and the geomagnetic field

Tanaka, T., Ebihara, Y., Watanabe, M., Fujita, S., & Kataoka, R. (2024). "Multiple convection cells induced by in‐front and off‐front interactions between the obliquely northward IMF and the geomagnetic field " Journal of Geophysical Research: Space Physics. 129, e2023JA031994.

Research Fields of Space Weather Forecast Featuring Magnetic Storm

片岡龍峰 (2024). "宇宙天気に関する研究の様々な広がり～磁気嵐の成因に関する研究紹介～" プラズマ・核融合学会誌. 100(4), 187-192

Characterization of Relativistic Electron Precipitation Events Observed by the CALET Experiment Using Self-Organizing-Maps

Vidal-Luengo, S. E., Blum, L. W., Bruno, A., Ficklin, A. W., de Nolfo, G., Guzik, T. G., et al. (2024). "Characterization of Relativistic Electron Precipitation Events Observed by the CALET Experiment Using Self-Organizing-Maps" Journal of Geophysical Research: Space Physics. 129, e2024JA032481

Hisotrical records and red sign

片岡龍峰 (2024). "縁起と赤気付・関連史料翻刻" 国文学研究資料館紀要文学研究篇. 50, 79-102.

Direct measurements of cosmic - ray iron and nickel with CALET on the International Space Station

Adriani, O. et al. (2024). "Direct measurements of cosmic - ray iron and nickel with CALET on the International Space Station" Advances in Space Research. in press.

On the Spatial and Temporal Evolution of EMIC Wave-Driven Relativistic Electron Precipitation: Magnetically Conjugate Observations From the Van Allen Probes and CALET

Blum, L. W., Bruno, A., Capannolo, L., Ma, Q., Kataoka, R., Torii, S., & Baishev, D. (2024). "On the Spatial and Temporal Evolution of EMIC Wave-Driven Relativistic Electron Precipitation: Magnetically Conjugate Observations From the Van Allen Probes and CALET" Studies in Japanese Literature and Culture. 51, e2023GL107087

Machine learning-based emulator for physics-based simulation of auroral current system

Kataoka, R., A. Nakamizo, S. Nakano, and S. Fujita (2024). "Machine learning-based emulator for physics-based simulation of auroral current system" Space Weather. 21, e2023SW003720

Atmospheric Ionizations by Solar X-Rays, Solar Protons, and Radiation Belt Electrons in September 2017 Space Weather Event

Murase, K., Kataoka, R., Nishiyama, T., Sato, K., Tsutsumi, M., Tanaka, Y., et al. (2023). "Atmospheric Ionizations by Solar X-Rays, Solar Protons, and Radiation Belt Electrons in September 2017 Space Weather Event" Space Weather. 21, e2023SW003651

Numerical Prediction of Changes in Atmospheric Chemical Compositions During a Solar Energetic Particle Event on Mars

Nakamura, Y., Leblanc, F., Terada, N., Hiruba, S., Murata, I., Nakagawa, H., et al. (2023). "Numerical Prediction of Changes in Atmospheric Chemical Compositions During a Solar Energetic Particle Event on Mars" Journal of Geophysical Research: Space Physics. 128, e2022JA031250

Probabilistic modelling of substorm occurrences with an echo state network

Nakano, S., Kataoka, R., Nosé, M., and Gjerloev, J. W. (2023). "Probabilistic modelling of substorm occurrences with an echo state network" Annales Geophysicae. 41, 529–539

Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons+Positrons in the TeV Region with CALET on the International Space Station

Adriani, O. et al. (CALET Collaboration) (2023). "Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons+Positrons in the TeV Region with CALET on the International Space Station" Physical Review Letters. 131, 191001

Learning Old Japanese and Chinese Literature from the Study of Aurora using Japanese Classical Texts

片岡龍峰 (2023). "日本の古典籍を用いたオーロラ研究から考える古文・漢文の学習" サステナビリティ教育研究. 第5号, 42-48

Machine learning emulator for physics-based prediction of ionospheric potential response to solar wind variations

Kataoka, R., S. Nakano, and S. Fujita (2023). "Machine learning emulator for physics-based prediction of ionospheric potential response to solar wind variations" Earth, Planets and Space. 75, 139

Response of high-altitude clouds to the galactic cosmic ray cycles in tropical regions

Miyahara H, Kusano K, Kataoka R, Shima S-i and Touber E (2023). "Response of high-altitude clouds to the galactic cosmic ray cycles in tropical regions" Frontiers in Earth Science. 11:1157753

A Ground-Based Instrument Suite for Integrated High-Time Resolution Measurements of Pulsating Aurora With Arase

Hosokawa, K., Oyama, S.-I., Ogawa, Y., Miyoshi, Y., Kurita, S., Teramoto, M., et al. (2023). "A Ground-Based Instrument Suite for Integrated High-Time Resolution Measurements of Pulsating Aurora With Arase" Journal of Geophysical Research: Space Physics. 128, e2023JA031527

Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station

Adriani, O. et al. (CALET Collaboration) (2023). "Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station" Physical Review Letters. 130, 211001

Radial Transport of Io Plasma From the Inner Magnetosphere to the Tail

Tanaka, T., Ebihara, Y., Watanabe, M., Fujita, S., & Kataoka, R. (2023). "Radial Transport of Io Plasma From the Inner Magnetosphere to the Tail" Journal of Geophysical Research: Space Physics. 128, e2022JA030891

The Clustering Occurrence of Red Sign Auroral Events in Japanese History

Kataoka, R. (2023). "The Clustering Occurrence of Red Sign Auroral Events in Japanese History" Studies in Japanese Literature and Culture. 6, 119-143

Service and leadership

JpGU SWSC session convener since 2015
ISSI workshop convener of auroral physics in 2018
PI of AuroraX project (2022-2027)
PI of AI emulator project (2024-2027)
PI of Mars camera project (2026-2030)

Ryuho Kataoka

CV

Education

Work experience

Awards

Recent Publications (listed ater 2023 only)

Recent Talks (listed after 2023 only)

Teaching

Service and leadership