Professors of Physics, Graduate School of Science

Professors with 「*」 do not take graduate students.
Professors with 「#」 do not take master's graduate students.
Professors with 「!」 has spesial report.
A8 Masaki ANDO Department of Physics ando[at] Our main target is to expand a new field of gravitational-wave astronomy. For it, we are participating as a main institute to a KAGRA project and constructing a large-scale cryogenic laser interferometer for gravitational-wave observation at Kamioka, Gifu. We are also developing key components for DECIGO, a space gravitational-wave telescope. In addition, we are working for experimental tests of relativity, and quantum measurements using laser interferometers.
A8 Aya BAMBA Department of Physics bamba[at]
A8 Yoshinari HAYATO Institute for Cosmic Ray Research hayato[at] 1) Neutrino oscillation experiments Mainly working on the accelerator based long baseline neutrino oscillation experiments. 2) Neutrino-nucleus scattering experiments including the development of a simulation program of neutrino-nucleus scattering. 3) R&D of the data acquisition system for the experiments.
A8 Kiwamu IZUMI The Institute of Space and Astronautical Science izumi.kiwamu[at] A major goal of our group is an achievement of gravitational wave observations from space and carrying out astronomical research based on the observations. Utilizing the inherently quiet environment in space, we aim at observing new classes of gravitational wave phenomena including background radiation generated in the very early universe. We carry out research and development activities in ground laboratory and simultaneously peruse the realization of high-precision formation flying mission for technology demonstration in orbit.
A8 Hidetoshi KUBO Institute for Cosmic Ray Research kubo[at] We observe cosmic gamma rays from an active galactic nucleus with a supermassive black hole, a neutron star with a strong magnetic field, and a gamma-ray burst to study their structures, physical conditions, and the mechanism of generating and releasing the huge energy. We furthermore conduct the dark matter search and verification of the quantum gravity theory through cosmic gamma-ray observations. We analyze the data observed with the ground-based telescope MAGIC and the gamma-ray satellite Fermi. In addition, we are constructing the next-generation gamma-ray observatory CTA in the Canary Islands and Chile.
A8 Akito KUSAKA Department of Physics akusaka[at] Why and how did our universe begin? How has it evolved? These are the key questions of our research. We explore these fundamental questions primarily through observing cosmic microwave background (CMB), the light from the very beginning of the universe. Through CMB, we study not only the fundamental nature of the universe, but also particle physics as well, such as the nature of neutrinos and unknown particles. Our approach is that of experimental physics, and our research entails development of cutting edge technologies such as those using superconducting instrumentation, and low-temperature and microwave engineering.
A8 * Kai MARTENS Kavli Institute for the Physics and Mathematics of the Universe kai.martens[at] 1. Dark Matter direct detection with the XENON experiment (LNGS, Italy) 2. Astrophysical neutrinos with Super-Kamiokande at the Kamioka Observatory, Gifu-ken
A8 Tomotake MATSUMURA Kavli Institute for the Physics and Mathematics of the Universe tomotake.matsumura[at] We study the physics of early universe using the measurement of cosmic microwave background (CMB) polarization. The theory of cosmic inflation can be tested by measuring the B-mode pattern in the CMB polarization experimentally. We are active member of LiteBIRD, the post ESA Planck satellite, to measure the CMB B-mode polarization. We develop observational hardware (polarization modulator), study systematics effects, develop new calibration strategy and prepare for the data analysis. We also participate POLARBEAR/Simons Array, and PILOT in development and characterization of hardware, operation, calibration and data analysis.
A8 Osamu MIYAKAWA Institute for Cosmic Ray Research miyakawa[at] We develop fundamental technologies for the large-scale cryogenic gravitational wave detector KAGRA, and improve the sensitivity of KAGRA. Our main research topics are the development of high-power lasers, input/output optics, interferometer control systems, data acquisition systems, and interferometer simulation. We establish detector commissioning and observation to detect gravitational waves in Japan, and aim to be a central gravitational wave observatory in the Asian region.
A8 Shinji MIYOKI Institute for Cosmic Ray Research miyoki_[at] I am working toward the direct detection of gravitational waves that is predicted by general theory of relativity. We have finished research and developments for over 20 years by using proto-type laser interferometers, and then we are now developing "KAGRA" Large-scale Cryogenic laser interferometer Telescope. I would like to detect gravitational waves and to start gravitational wave astronomy as one of GW detectors as LIGO, VIRGO and GEO600 in the world. In addition to gravitational wave research, I am trying to observe macroscopic quantum mechanics by using ultra-precise length measurement technique.
A8 Shigetaka MORIYAMA Institute for Cosmic Ray Research moriyama[at] My fields of interest include dark matter, axions, neutrino physics, and proton decay. My research comprises of two experimental approaches. The first approach involves the use of a liquid xenon target that is sensitive to an energy scale ranging from sub-keV to MeV. The XENONnT detector with ~10 ton of liquid xenon is used to discover dark matter particle in the Universe with the world best sensitivity. The second approach involves the use of Super-Kamiokande. The hierarchy of neutrino masses and CP violation in the lepton sector may be crucial for understanding the existence of matter in the Universe, and an observation of proton decay clearly indicates a large framework of particle physics. We are working to realize a much larger detector, the Hyper-Kamiokande.
A8 Takao NAKAGAWA The Institute of Space and Astronautical Science nakagawa[at] Using Infrared observations from space-borne platforms, especially the infrared astronomical satellite AKARI, I am working on the birth and evolution of various types of objects in the universe, namely (1) galaxy formation and evolution, (2) formation of stellar and planetary systems. I am also working on the projects to develop unique observation instruments, which enables the above mentioned targets. The current main project is SPICA, which is expected to play cruicial roles in every field of astronomy.
A8 Masayuki NAKAHATA Institute for Cosmic Ray Research nakahata[at] Research on neutrinos using the Super-Kamiokande detector. Especially, observations of supernova neutrinos and solar neutrinos are performed. With these observations, I study elementary-particle physics and neutrino astronomy.
A8 Shoei NAKAYAMA Institute for Cosmic Ray Research shoei[at]
A8   Shoichi OGIO Institute for Cosmic Ray Research


Telescope Array experiment, the largest cosmic ray detector in the northern hemisphere with a detection area far exceeding 1,000 square kilometers, is operated in Utah, USA, to observe the highest energy cosmic rays reaching macroscopic energies of 10 to 20th electron volts. We aim to elucidate the sources that accelerate (elementary) particles to such ultra-high energies and the propagation of such cosmic rays in the universe.
A8 Masatake OHASHI Institute for Cosmic Ray Research ohashi[at] We want to detect gravitational waves from various sources as compact binary by KAGRA. The observation of KAGRA will start at 2018.
A8 Kimihiro OKUMURA Institute for Cosmic Ray Research okumura[at] I am interested in neutrino physics, and involved in Super-Kamiokande experiment, T2K experiment, and Hyper-Kamiokande project. We are studying for the issues of leptonic CP asymmetry and mass hierarchy via the precise measurements of neutrino oscillation in the atmospheric and accelerator neutrinos. Another research on the cosmic ray physics is being done by the flux measurement of the atmospheric neutrino. We plan to promote the development of the future neutrino detector and instrument in future.
A8 Masami OUCHI Institute for Cosmic Ray Research ouchims[at] We study the early universe by observations. Armed with the state-of-the art telescopes such as Subaru and Hubble (+ALMA), we aim to push the today's observational frontier towards the very high redshift universe that no one has ever seen by observations. Our goal is understanding physical processes of galaxy formation at the early stage and the relevant event of cosmic reionization.
A8 Takashi SAKO Institute for Cosmic Ray Research sako[at]
A8 *# Makoto SASAKI Institute for Cosmic Ray Research sasakim[at] We make observations of very-high energy gamma, nuclei, neutrinos, and optical flashes from violent celestial objects with wide angle high resolution compound-eye optical telescopes deployed on Mauna Loa on Hawaii Island toward night sky and the earth. We are planning to make observations simultaneously with compound-eye optical telescopes deployed at four sites on Hawaii Island, which are scaled up from the Ashra-1 detector units and the world largest astronomical tau neutrino telescope, i.e. Ashra Neutrino Telescope Array (Ashra NTA). We are pioneering full-fledged particle astronomy with PeV-EeV neutrinos and TeV-PeV gamma-rays by clearly identifying positions of the unrevealed source objects.
A8 Hiroyuki SEKIYA Institute for Cosmic Ray Research sekiya[at] Neutrino experiments and dark matter searches using Super-Kamiokande, EGADS, XMASS and other detectors. Super-Kamiokande Gd project has been started in order to detect the diffuse supernova neutrino background.
A8 Masato SHIOZAWA Institute for Cosmic Ray Research masato[at] My research interests are experimental tests of unification of elementally particles and their forces by nucleon decay searches and neutrino oscillation studies. I have been participating the Super-Kamioande, K2K, and T2K experiments. As a project leader, I am aiming to realize the next generation detector Hyper-Kamiokande.
A8 Masato TAKITA Institute for Cosmic Ray Research takita[at] We set up a large (37000-m**2) air shower arrays at Yangbajing in Tibet,China. We aim at observing multi-TeV cosmic gamma rays from astoronomical point sources such as AGN (active galactic nuclei), supernova remnants, GRBs (galactic gamma-ray bursts), etc. At the same time, we are tryingto disentangle the old enigmas in cosmic-ray physics: the origin of cosmic rays and their acceleration mecanism and the chemical composition of the primary cosmic rays. Those who find research fun in discussing with colleagues and in cooperative work (detector construction, for example) maybe more suitable than those who like to do physics by themselves. Normally, we do data analysis and development of new detectors at ICRR (Institute for Cosmic Ray Research) at Kashiwa.
A8 Takashi UCHIYAMA Institute for Cosmic Ray Research uchiyama[at] Detection of gravitational wave which is predicted in Einstein's general theory of relativity and establishment of gravitational wave astronomy.
A8 Mark VAGINS Kavli Institute for the Physics and Mathematics of the Universe mark.vagins[at] My research is focused on developing new methods of observing neutrinos, both through the enhancement of existing detectors like Super-Kamiokande (Super-K) and via the design and construction of future facilities like Hyper-Kamiokande. One of my main goals is to measure, for the first time, the diffuse supernova neutrino background (DSNB), often called the “relic” supernova neutrinos. Adding water-soluble gadolinium to Super-K - an idea I co-invented - should allow us to detect these relic neutrinos without having to build an all-new experiment. Enhancing Super-K in this manner will also make possible other new physics, including high-statistics reactor antineutrino oscillation studies, as well as improve studies of neutrino oscillations and proton decay searches.
A8 Hiroya YAMAGUCHI The Institute of Space and Astronautical Science yamaguchi[at] My research interest is on high-energy astronomical phenomena, such as those observed in stellar flares, supernova remnants, and galaxy clusters. Observations of these objects using artificial satellites allow us to reveal how the Universe has evolved to date. I'm also developing facilities enabling "laboratory astrophysics" to reproduce radiation processes relevant to the high-energy astronomical objects on ground. In my main institute JAXA/ISAS, I'm involved in the XRISM project as Deputy Project Scientist, responsible for the science lead. Before coming back to ISAS last year, I was in the US for 7.5 years.
A8 Noriko YAMASAKI The Institute of Space and Astronautical Science yamasaki[at] High energy astrophysics: Through observational studies of hot plasma associated with galaxies, hot /warm inter-galactic medium and high energy phenomena in the intra-cluster medium, I try to understand the dynamical and chemical evolution in the universe. With observational study with Suzaku and Hitomi observatory, I promote to realize ultra-high energy resolution spectroscopy in coming missions, Athena, DIOS etc. Also novel detector development like TES and other kind of non-resistive calorimeters is underway.
A8 Takanori YOSHIKOSHI Institute for Cosmic Ray Research tyoshiko[at] T.Y. researches physics of celestial objects emitting very high energy gamma rays using imaging atmospheric Cherenkov telescope arrays. In particular, he aims to resolve the mystery of the origin of cosmic rays by observing supernova remnants, pulsar wind nebulae, etc. He is also doing R & D studies for next generation atmospheric Cherenkov telescopes.
Professors with 「*」 do not take graduate students.
Professors with 「#」 do not take master's graduate students.
Professors with 「!」 has spesial report.