Directors Program Director Tetsuo Hatsuda Particle and Nuclear Physics Deputy Program Director Takashi Tsuboi Topology, Dynamical Systems Deputy Program Director Catherine Beauchemin Virophysics Deputy Program Director Tsukasa Tada Theoretical Particle Physics Deputy Program Director (concurrent) Shigehiro Nagataki Extreme Universe Deputy Program Director (concurrent) Takemasa Miyoshi Data Assimilation Scientific Advisors Senior Advisor Shigefumi Mori Mathematics, Algebraic Geometry Senior Advisor Yoh Iwasa Mathematical Biology Senior Advisor Masato Wakayama Mathematics Scientific Advisor Makoto Kobayashi Theoretical Particle Physics Coordinator Coordinator / Director, Office of the Program Director (concurrent) Tomoya Nagai R&D Administration, Science Communication Researchers Senior Research Scientist Gen Kurosawa Theoretical Biology Senior Research Scientist Takumi Doi Computational Particle and Nuclear Physics Senior Research Scientist Jeffrey Fawcett Genome Evolution Senior Research Scientist Yuki Yokokura Theoretical Physics (Quantum Gravity, Black Hole, Thermodynamics) Senior Research Scientist Ching-Kai Chiu Condensed Matter Physics Senior Research Scientist Ryo Namba Theoretical Cosmology, Gravitational Theory Senior Research Scientist Ryosuke Iritani Mathematical Biology, Evolutionary Ecology Senior Research Scientist Masazumi Honda Theoretical Physics, High Energy Theory, Quantum Computation, Mathematical Physics Senior Research Scientist Shunji Matsuura Quantum Computing Research Scientist Keita Mikami Mathematics, Analysis, Partial Differential Equations Research Scientist Derek Beattie Inman Theoretical and Computational Cosmology Research Scientist Misako Tatsuuma Planetary Formation Theory Research Scientist Kyosuke Adachi Biophysics, Condensed Matter Physics Research Scientist Camilia Demidem Theoretical and Computational Approaches in High-Energy Astrophysics Research Scientist Lingxiao Wang Particle and Nuclear Physics, Machine Learning, AI for Science Research Scientist Akihisa Yamamoto Biomedical Engineering, Soft-matter Physics, Biophysics Special Postdoctoral Researcher Takeru Yokota Theoretical Physics, Many-body Problems Special Postdoctoral Researcher Kazuki Kannaka Mathematics Special Postdoctoral Researcher Eiji Inoue Mathematics Special Postdoctoral Researcher José Said Gutiérrez-Ortega Evolutionary Biology, Ecology Special Postdoctoral Researcher Yuto Moriwaki Conformal Field Theory, Representation Theory Special Postdoctoral Researcher Taketo Sano Mathematics, Topology Special Postdoctoral Researcher Tomoya Naito Quantum Many-Body Problems (Computational), Nuclear Physics Special Postdoctoral Researcher Christy Koji Kelly Gravity, Lorentzian Geometry, Lorentzian Optimal Transport Theory, Discrete Curvature Special Postdoctoral Researcher Thomas Hitchcock Evolution, Ecology, Genetics Special Postdoctoral Researcher Seishiro Ono Quantum Condensed Matter Physics Special Postdoctoral Researcher Che-Yu Chen Gravitational Theory, Black Hole Physics Special Postdoctoral Researcher Yuto Yamamoto Algebraic Geometry, Tropical Geometry Special Postdoctoral Researcher Osamu Fukushima Theoretical Physics, Quantum Field Theory, Integrable System Special Postdoctoral Researcher Junnosuke Koizumi Algebraic Geometry, Arithmetic Geometry Special Postdoctoral Researcher Takashi Satomi Harmonic Analysis, Functional Analysis Special Postdoctoral Researcher Okuto Morikawa Theoretical Physics, Quantum Field Theory, Non-perturbative Formulation and Simulation Special Postdoctoral Researcher Kan Kitamura Operator Algebras, Quantum Symmetries Postdoctoral Researcher Shingo Gibo Theoretical Biology, Nonlinear Oscillation, Acoustic Engineering Postdoctoral Researcher Congcong Le Condensed Matter Physics, Materials Sciences Postdoctoral Researcher Jizhou Li Chaos and Dynamical Systems, Virophysics Postdoctoral Researcher Puttarak Jai-akson Theoretical Physics, Classical/Quantum Gravity Postdoctoral Researcher Pratik Nandy Quantum Chaos, Quantum Entanglement, AdS/CFT Postdoctoral Researcher Dongwook Ghim String Theory, Quantum Computation Postdoctoral Researcher Amaury Micheli Theoretical Cosmology, Quantum Entanglement Postdoctoral Researcher Lucy McNeill Astrophysics Postdoctoral Researcher Rento Yamada Senior Research Scientist (concurrent) Ryusuke Hamazaki Statistical Mechanics Senior Research Scientist (concurrent) Akinori Tanaka Machine Learning, Mathematical Physics Research Scientist (concurrent) Shigenori Otsuka Data Assimilation Research Scientist (concurrent) Hajime Sotani Nuclear Astrophysics Research Scientist (concurrent) Shun Ohishi Special Postdoctoral Researcher (concurrent) Akira Dohi Nuclear Astrophysics Postdoctoral Researcher (concurrent) Ken Furukawa Mathematics Researchers (RIKEN-Berkeley Fellow) Postdoctoral Researcher Maria Manuela Saez Neutrino Physics, Astroparticles Postdoctoral Researcher Jan Schuette-Engel Particle Physics, Astroparticle Physics, Cosmology Postdoctoral Researcher Yantao Wu Physics, Chemistry Postdoctoral Researcher Yan Lyu Hadronic Physics, Lattice Gauge Field Theory RIKEN Quantum RIKEN Quantum Website Senior Research Scientist Steffen Backes Condensed Matter Physics Postdoctoral Researcher Yuta Sekino Condensed Matter Physics, Ultracold Atoms Postdoctoral Researcher Yaokun Lei Machine Learning Force Field, Rare Event Sampling, Reaction Dynamics Senior Research Scientist (concurrent) Yuji Sugita Theoretical Chemistry Senior Research Scientist (concurrent) Tomonori Shirakawa Condensed Matter Physics Postdoctoral Researcher (concurrent) Rongyang Sun Quantum Many-body Physics Coordinator (concurrent) Shinichiro Fujii Nuclear Theory, Project Management Research Consultants Research Consultant Koichi Yazaki Nuclear and Hadron Physics Research Consultant Kenji Fukaya Geometry Research Consultant Takeo Inami Research Consultant Kazuo Fujikawa Particle theory, Quantum science Senior Visiting Scientists Senior Visiting Scientist Wick C. Haxton Nuclear Astrophysics Senior Visiting Scientist Gordon Baym Quantum Many-body Theory Senior Visiting Scientist Hiroshi Suito Applied Mathematics, Computational Fluid Dynamics Senior Visiting Scientist Hideaki Aoyama Elementary Particle Theory, Mathematical Linguistics, Econophysics Senior Visiting Scientist Yasuyuki Kawahigashi Operator Algebras Senior Visiting Scientist Takashi Sakajo Applied Mathematics (Mathematical Fluid Dynamics) Senior Visiting Scientist Hidetoshi Nishimori Statistical Mechanics, Quantum Computation Senior Visiting Scientist Yoshiyuki Inoue High Energy Astrophysics Senior Visiting Scientist Motoko Kotani Geometry Senior Visiting Scientist Atsushi Mochizuki Theoretical Biology Senior Visiting Scientist (concurrent) Kazuyuki Aihara Mathematical Engineering Visiting Scientists (SUURI-COOL) Visiting Scientist Masato Itami Statistical Physics Visiting Scientist Sonia Mahmoudi Mathematics, Topology Visiting Scientists (iTHEMS Alumni) Visiting Scientist Yoshimasa Hidaka Theoretical Physics Visiting Scientist Yuka Kotorii Mathematics, Topology Visiting Scientist Genki Ouchi Mathematics, Algebraic Geometry Visiting Scientist Shun Furusawa Astrophysics, Nuclear Physics Visiting Scientist Masato Taki Mathematical Physics, Machine Learning Visiting Scientist Masashi Tachikawa Cell Biology, Biophysics Visiting Scientist Takashi Okada Mathematical Biology Visiting Scientist Masaru Hongo Particle and Nuclear Physics, Nonequilibrium physics Visiting Scientist Kanato Goto High Energy Theory, String Theory, Quantum Gravity Visiting Scientist Masahiro Nozaki Elementary Particle Physics, Quantum Information Visiting Scientist Naomi Tsuji Astrophysics Visiting Scientist Michiya Mori Mathematics, Physics Visiting Scientist Don Warren Cosmic Rays, Gamma-ray Bursts, Virology Visiting Scientist Shou Yoshikawa Algebraic Geometry Visiting Scientist Yongjia Huang High Energy Astrophysics, Gravitational Wave Astrophysics Visiting Scientist Euki Yazaki Genome Evolution, Molecular phylogeny, Protistology Visiting Scientist Masaki Taniguchi Mathematics, Topology Visiting Scientist Naritaka Oshita Quantum/Classical Gravity, Cosmology, Quantum Field Theory Visiting Scientist Yosuke Kubota Mathematics, Index Theorem Visiting Scientist Etsuko Itou Particle and Nuclear Physics, Lattice QCD, Quantum Computing Visiting Scientist Akira Matsumoto Theoretical Particle Physics, Lattice Gauge Theory, Quantum Computing Visiting Scientist Ermal Rrapaj Nuclear Astrophysics, Quantum Computing Visiting Scientist Gilles Ferrand Astrophysics Visiting Scientist Kotaro Murakami Physics Visiting Scientist Yasunori Nomura Quantum Gravity, Cosmology, Particle Physics Visiting Scientist Ade Irma Suriajaya Analytic Number Theory Visiting Scientist Yingying Xu Mathematical Sciences Visiting Scientist Hui Tong Nuclear Theory Visiting Scientist Tomoki Ozawa Condensed Matter Physics, AMO Physics, Topological Insulator Visiting Scientist Yalong Cao Algebraic Geometry, Mathematical Physics Visiting Scientist Takuya Sugiura Theoretical Nuclear and Hadronic Physics Visiting Scientist Kenta Sato Mathematics, Algebraic Geometry Visiting Scientist Hokuto Konno Mathematics, Geometry and Topology Visiting Scientist Yuya Kusuki Physics Visiting Scientist Nagisa Hiroshima Dark Matter, High Energy Astrophysics Visiting Scientists (Academia) Visiting Scientist Shinya Wanajo Cosmo-nuclear Science Visiting Scientist Kentaro Takami Theoretical Astrophysics Visiting Scientist Tetsuo Hyodo Physics Visiting Scientist Shingo Iwami Mathematical Sciences, Life Sciences Visiting Scientist Yuki Kamiya Physics Visiting Scientist Kenji Sasaki Visiting Scientist Wataru Souma Visiting Scientist Haozhao Liang Visiting Scientist Hiroshi Suzuki Visiting Scientist Noriyoshi Ishii Visiting Scientist Sinya Aoki Visiting Scientist Faisal Etminan Visiting Scientist Takashi Inoue Visiting Scientist Motoi Tachibana Visiting Scientist Yoji Ohashi Visiting Scientist Atsushi Nakamura Visiting Scientist Kazuya Mameda Visiting Scientist Yoichi Ikeda Hadron and Nuclear Physics Visiting Scientist Yuji Sakai Theoretical Biology Visiting Scientist Shunsuke Kobayashi Applied mathematics Visiting Scientist Koya Sakakibara Numerical Analysis, Mathematical Fluid Dynamics Visiting Scientist Hiroshi Kokubu Dynamical Systems and Applications Visiting Scientist Hiroki Kodama Topology, Dynamical Systems Visiting Scientist Takahiro Doi Visiting Scientist Christopher Bourne Mathematics, Operator Algebras, Topological Phases Visiting Scientist Gergely Péter Fejös Visiting Scientist Shin Hayashi Mathematics, Topology Visiting Scientist Gabriel Gress Visiting Scientist Tomonori Ugajin Visiting Scientist Koichi Murase Visiting Scientist Tomoya Hayata Visiting Scientists (Industry) Visiting Scientist Shinya Gongyo Physics Visiting Scientist Hirotaka Irie Quantum Computation, Mathematical Physics Visiting Scientist Hiroyasu Miyazaki Arithmetic and Algebraic Geometry Visiting Scientist Shoichiro Tsutsui Visiting Scientist Yuta Kikuchi Elementary Particle Physics Visiting Scientist Toshihiro Ota Mathematical Physics, Machine Learning Visiting Scientist Enrico Rinaldi Particle and Nuclear Physics, Machine Learning Student Trainee Intern Junior Research Associate / Student Trainee (concurrent) Yixin Guo Physics Junior Research Associate / Student Trainee (concurrent) Daiki Kumakura Microbial Evolutionary Ecology, Genome Evolution, Mathematical Biology Junior Research Associate / Student Trainee (concurrent) Tingyu Zhang Junior Research Associate / Student Trainee (concurrent) Soichiro Uemura Topology, Mathematical Physics Junior Research Associate / Student Trainee (concurrent) Taiichi Nakanishi Student Trainee Liang Zhang Student Trainee Chuanxin Wang Quantum Many-Body Problems, Nuclear Physics Student Trainee Keiichi Morita Mathematical Biology, Evolutionary Community Ecology Staff Research Administrator / Research Administrator, Office of the Program Director (concurrent) Iriko Kaneko Assistant, Office of the Program Director Hitomi Wada Assistant, Office of the Program Director Chikako Ota Assistant, Office of the Program Director Tomoko Iwanami Assistant, Office of the Program Director Yuko Kawatsu Assistant, Office of the Program Director Nobuko Tanabe Part-time Worker, Office of the Program Director Keiko Ueda Part-time Worker, Office of the Program Director Rieko Zasu Visitors