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Chief Scientist Laboratories Computational Astrophysics Laboratory

Chief Scientist: Toshikazu Ebisuzaki (Ph.D.)

Research Summary

Toshikazu  Ebisuzaki

We promote the EUSO (Extreme Universe Space Observatory onboard Japanese Experiment Module) mission to explore the origin of extreme energy particles, above 1020eV. In addition, we conduct studies of the wakefield acceleration of ultra high energy cosmic rays around accreting supermassive blackholes. formation and merging of a black hole binary. Next, we also study the formation process of the life planets and the origin of life in the Hadean Earth, joining KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas“Hadean Bioscience”. We are proposing “Tandem planet model” as a new frame work of planetary formation.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Informatics
  • Interdisciplinary Science & Engineering
  • Biology
  • Astrophysics
  • Computational Science


  • Ultra High Energy Cosmic-Rays
  • Space debris
  • Supercomputing, Black hole
  • Planetary formation
  • Origin of Life

Selected Publications

  • 1.Toshikazu Ebisuzaki, Shigenori Maruyama.:
    "Nuclear geyser model of the origin of life: Driving force to promote the synthesis of building blocks of life", Geoscience Frontiers, 8, (2017) 275-298
  • 2.EUSO collaboration, (corresponding author: Lech Wiktor Piotrowski ).:
    "EUSO-TA - First results from a ground-based EUSO telescope"
    Astroparticle Physics, 102 (2018) 98-11
  • 3.T. Ebisuzaki, Y. Imaeda.:
    "United theory of planet formation (i): Tandem regime"
    New Astronomy 54, 7-23(2017). doi: 10.1016/j.newast.2016.11.001
  • 4.T. Nimura, T. Ebisuzaki, S. Maruyama.:
    "End-cretaceous cooling and mass extinction driven by a dark cloud encounter"
    Gondwana Research 37, 301-307 (2016). doi: 10.1016/j.gr.2015.12.004
  • 5.Toshikazu Ebisuzaki, Mark N. Quinn, Satoshi Wada, Lech Wiktor Piotrowski, Yoshiyuki Takizawa, Marco Casolino, Mario E. Bertaina, Philippe Gorodetzky, Etienne Parizot, Toshiki Tajima, Remi Soulard, Gerard Mourou.:
    "Demonstration designs for the remediation of space debris from the International Space Station"
    Acta Astronautica 112, 102-113 (2015)
  • 6.Ebisuzaki T, Maruyama S.:
    "United theory of biological evolution: Disaster-forced evolution through Supernova, radioactive ash fall-outs, genome instability, and mass extinctions"
    Geoscience Frontiers 6, 103-119 (2015)
  • 7.Fumiyoshi Kajino, Toshikazu Ebisuzaki, Marco Casolino, Yoshiyuki Takizawa, Yoshiya Kawasaki, Naoto Sakaki, Sergei Sharakin, Pavel Klimov, Mikhail I. Panashyuk for the JEM-EUSO Collaboration.:
    "K-EUSO: An improved optical system for KLYPVE ultra-high energy cosmic ray space telescope" Proc. 34th ICRC (Hague), 634 (2015)
  • 8.The JEM-EUSO Collaboration.:
    "The JEM-EUSO mission: An introduction"
    Special Issue on the JEM-EUSO Mission, Experimental Astronomy 40, 3-17 (2015), ISSN: 0922-6435
  • 9.Ebisuzaki, T. and Tajima, T.:
    "Astrophysical ZeV acceleration in the relativistic jet from an accreting supermassive blackhole"
    Astroparticle Physics, 56, 9-15. (2014)
  • 10.Shirao T, Ueno K, Abe T and Matsuyama T.:
    "Development of DNA markers for identifying chrysanthemum cultivars generated by ion-beam irradiation"
    Molecular Breeding 31:729-735, (2013)

Recent Research Results

Annual research report

Related Links

Lab Members

Principal investigator

Toshikazu Ebisuzaki
Chief Scientist

Core members

Tomoki Matsuyama
Senior Research Scientist
Yoshiyuki Takizawa
Senior Research Scientist
Marco Casolino
Research Scientist
Lech Piotrowski
Research Scientist
Junichiro Makino
Research Scientist
Naoto Sakaki
Contract Researcher
Yoshiaki Kato
Contract Researcher
Iriko Kaneko
Technical Staff I
Tomohiro Tsukihana
Technical Staff I
Toshiki Tajima
Senior Visiting Scientist
Piergiorgio Picozza
Senior Visiting Scientist
Shigenori Maruyama
Senior Visiting Scientist
Masuo Suzuki
Visiting Scientist
Naohito Nakasato
Visiting Scientist
Kenji Yasuoka
Visiting Scientist
Yuichi Yatsuyanagi
Visiting Scientist

Contact Information

2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: cap-labinfo [at] riken.jp