We employ computer simulations or use just a pen and paper to develop novel theoretical frameworks of particle physics. Our goals are to understand the origin of the laws of the fundamental particles and what matter constitutes the Universe and how, and also to unravel puzzling phenomena that are inexplicable with the current Standard Model of particle physics.

Theoretical and observational research on astrophysics. The main research fields are as follows. Gravitational lensing, observational cosmology, dark matter, baryonic physics, galaxy clusters, black holes, neutron stars, pulsar magnetosphere, particle acceleration, gravitational waves, gravitational-wave cosmology, tests of gravity in extreme environments, and fundamental particle searches.

We aim to unravel the mystery of how the Universe began with experiments of high-energy particle collision etc, which enable us to track the evolutionary history of the Universe to the Big Bang, to reproduce in the laboratory the matter conditions that filled the Universe at the very beginning, to reveal the characteristics of ultra-high-temperature and high-density quark matters, and to investigate a variety of particle-physics phenomena emerging in such a condition.

Primary objective of our group is to explore the fundamental principles of nature. We explore the mysteries of the beginning of the universe with high-energy accelerators and study quantum physics using lasers and optics. We are also actively pursuing the application of technologies developed in experimental particle physics and accelerator science.

(High-energy astrophysics) We conduct observational studies of phenomena of high-energy objects in the Universe, such as black holes, jet sources, galaxies and clusters of galaxies, and gamma-ray bursts, using X-ray and gamma-ray observatories in orbit. We also develop X-ray/Gamma-ray detectors for satellites, and make coordinated observations with Kanata Telescope.

(Optical and infrared astronomy) We study astrophysical phenomena with optical/infrared observations, mainly using the 1.5m telescope (Kanata Telescope) of Higashi-Hiroshima observatory, and also with multi-wavelength coordinated observations. We also develop instruments for astronomical observations and conduct pilot studies for future satellites and large ground-based telescopes.

The properties of a material is governed with how its electrons behave. We study how the properties characteristic to a material (dielectricity, electrical conductivity, magnetism, etc) come out by means of precise visualisation of the electron density distribution in the material, using diffraction of synchrotron radiation.

In order to investigate the properties (magnetism and dielectricity) of solids, which electrons make up, we employ a variety of methods of experiments, including diffraction of synchrotron X-ray radiation, absorption, magnetic circular dichroism, and photo-electron spectroscopy. In particular, we focus on spectroscopic experiments by organically combining the parameters of temperature, magnetic field, pressure, electric field, etc.

We are studying the microscopic mechanism of how high-temperature superconductivity emerges and the electron structure of the new material called topological insulator in our world-class quality laboratory, to which high-luminosity synchrotron radiation generated in The Hiroshima Synchrotron Radiation Center (HiSOR) of Hiroshima University is guided.

Molecular photoscience is the interdisciplinary field that is branched out of physics of interaction between light and matter and is combined with chemistry and biology. We aim to unravel the functions, characteristics, and reaction mechanisms of nanomaterials and bio-related molecules to the atomic scale and develop their application.

We study a variety of electromagnetic radiation phenomena originating in interaction between electromagnetic field and high-energy electrons that moves in vacuum at a speed close to that of light, tap them for potential application, develop modern advanced particle accelerators to generate quantum beam, and research beam physics for accelerators.

We investigate the atomic and electronic structures of materials to understand the microscopic origin of their various properties using excellent properties of synchrotron radiation. We are also developing advanced measurement systems to make the most of synchrotron radiation.