Faculty and Researchers

Topology, 3D Manifolds, Knot Theory

A 3-manifold is a space in which a 3D coordinate system can be drawn around arbitrary points. Although it’s difficult to visualize an entire 3-manifold, work here involves cutting and pasting spaces and curves in order to study geometric properties such as symmetry.

General Relativity, Gravitation, Cosmology

Investigation is conducted into overall space dynamics and black holes using general relativity. A focus of research is on high-dimensional space models and high-dimensional black holes, which look at the possibilities of high-dimensional space-time.

Cosmology, Astrophysics, Gravitational Astronomy

Dark matter and dark energy are mysterious substances that account for a large portion of the universe. Solutions to these mysterious substances are sought using general relativistic phenomena on cosmic scales such as gravitational lenses, gravitational waves and cosmic inhomogeneity (halos and voids).

Coordination Chemistry, Physical Chemistry, Organic Opto-Electronic Devices

Metal complexes, which are composite inorganic/organic compounds, can be expected to exhibit unique physical properties due to their distinct structure and electronic states. We synthesize new metal complexes having a polymer structure, and after clarifying their structure, electronic states, and electrical conductivity, apply them in organic photoelectronic devices such as solar cells.

Elemental Particle Theory, Quantum Gravity Theory, Superstring Theory, Cosmology

Studies are carried out on elemental particles, which are smaller than atoms, through the theory of relativity and quantum mechanics, and research is conducted into cosmology and the unified theory of elemental particles, including gravity, through the general theory of relativity and superstring theory.

Representation Theory of Finite Groups

Examination is carried out into finite groups and their representation using a category theory approach. Research is conducted into group actions on simplicial complexes, semi-ordered sets, and modules.

Experimental Particle Physics

We know that matter is composed of things like quarks and other subatomic particles. But what are subatomic particles composed of? Using a large particle accelerator, research here tries to answer questions like this.

Biophysical Chemistry, Solution Chemistry

Research on elucidating the so-called “blueprint” and “operating manual” of proteins by understanding the nature of proteins under a variety of conditions (temperature, pressure, solvents, additives, etc.).

Coordination Chemistry

Researching nano-scale molecular quantum magnets typified by single-molecule magnets. In addition, research on a variety of functional metal complexes expected to serve as semiconductor materials for switching elements and solar cells.

Quantum Information, Condensed Matter Physics

Research is carried out with an interest in a wide range of control methods, in which quantum mechanics such as quantum information and quantum control play an important role. In particular, if quantum computers are realized, it will change the world. It is hoped that the elemental research conducted here will help make such computers a reality.

Photobiological Chemistry

We focus on the mechanisms of photobiological reactions, such as photosynthesis, at the molecular level. In addition, we develop photofunctional nanomaterials that will contribute to solve energy and environmental issues.

Topology

I am studying 4D manifolds and the higher dimensional manifolds by using singularity theory of differentiable maps. There appears singular points in general which degenerate for the differential of smooth maps, so we try to observe the method of eliminating singularities with higer coranks.

Poly-Nuclear Metal Complex, Polymer Particles

Polymers are used in synthetic fibers, resins, and rubbers. We research the synthesis of functional polymer particles that can assume a variety of characteristics by chemically modifying the polymer particle surface where the particles have a uniform size.

Algebraic Analysis, Mathematical Physics, Integrable Systems

Solvable models of mathematical physics are referred to as `integrable systems'. I am studying integrable systems and mathematical physics by the method of algebraic analysis. Not only being extremely interesting in themselves, integrable systems are also closely related to many other fields of mathematics.

Molecular Oncology, Diagnostic Pathology, Experimental Pathology

Cancer progresses in stages: as genetic abnormalities accumulate, it progresses from precancerous lesions to cancer. In addition to searching for genetic mutations of unfavorable prognoses, refractory cancer, such as in pancreatic cancer, lung cancer, and bone cancer, research includes cell function analysis through the creation of cancer cells to knock down target genes. The goal is to shed light on molecular mechanisms in cancer infiltration and metastases, and in the acquisition of resistance to anti-cancer drugs.

Quasicrystal Physics, Soft Matter Physics, Condensed Matter Physics

This laboratory is the world leader in soft quasicrystal research. This laboratory made the world’s first discovery of a polymeric quasicrystal, implying that even soft matter has an ordered structure with no repetitive units. Theoretical research on the origin of the formation of soft quasicrystals appeared in Nature. Recently Dr. Dotera found the bronze-mean quasicrystal. Also, he aims to develop the science of gyroid.

Biogeochemistry

A wide variety of substances are present on Earth, and among them are elements essential to living organisms. We elucidate the circulation mechanism for these elements on Earth.

Peptide and Protein Folding, Physiological Activity, Molecular Evolution, Genetic Engineering, Peptide and Protein Science, Disulfide Binding

The conformational changes of the native proteins cause several diseases, such as Alzheimer's disease. Disulfide bonds play a critical role in the maintenance of the native (bioactive) conformation of peptides and proteins under thermodynamic or kinetic control. Therefore, it is important to regulate disulfide bond formation in protein folding. We currently focus on the development the chemical methods to regulate disulfide-coupled peptide and protein folding

Cell Biology, Neurobiology, Lipid Biology

How is the complex neural circuitry of the brain created, what affects the actions of animals, and what mechanisms do nerves and cancer share? The mysteries behind these questions are delved into using research drawing on molecular biology.

Coordination Chemistry, Organometallic Chemistry

We study about the syntheses, structures and functions of metal complexes and coordination polymers with gaseous small molecules (olefins, carbonyls, hydrides, etc.).

Environmental Microbiology, Bioaerosols, Airborne microorganisms, Public health, Climate change

Synthetic Organic Chemistry, Chemistry of Functional Molecules

Broad-based research on the synthesis of organic compounds having a variety of functions, including their applications such as organic transistors and organic solar cells. In particular, synthesis of fluorescent organic materials with potential application as organic EL materials.

Physical Chemistry and Chemistry of Nanostructures

Laser ablated polyenes and fullerenes are studied by molecular spectroscopy and quantum chemistry. With experimental and theoretical knowledges on stability and structures of carbon molecules, microscopic views of high-temperature molecular processes are discussed.

Finite Group Theory

Research is conducted into finite groups and combinatorial structures constructed from groups.

Number Theory

Fish Physiology, Behavioral Neuroendocrinology

What controls the wide range of behaviors we see in animals? Focusing on the genes that develop in the brain, the center of behavior, fish are used to conduct research into the mechanisms that control behavior.

Theory of Condensed Matter Physics

A gas of neutral atoms cooled down to near absolute zero temperature causes a phase transition called Bose-Einstein condensation, resulting in quantum condensates possessing strange properties, as exemplified by superfluidity. We investigate various phenomena exhibited by atomic Bose-Einstein condensates.

Special functions and Integrable systems

My research field is the theory of special functions which are defined by differential or difference equations in complex domains. These special functions are related to various fields of pure mathematics and applied mathematics. Therefore they are very interesting research object.

Theory of condensed matter physics, Theory of atomic, molecular, and optical physics, Theory of quantum control

In condensed matter systems, such as electrons in solids and liquid helium, competitions and/or collaborations of quantum nature and interparticle interactions lead to various interesting phenomena, including superfluidity, superconductivity, quantum phase transitions, and many-body localization. We develop theoretical methods describing quantum many-body systems, aiming to discover novel quantum many-body effects.

Analytic Number Theory, Coding Theory

Coding theory is about ways to properly relay information. It is a comprehensive theory that is the result of numerous mathematical developments. Research is conducted with a focus on algebra, including coding theory as a mathematical theory and related group theory, and ring theory. Research is also conducted into analytic number theory as it relates to ciphers.

Computational Algebraic Analysis

Using computational algebraic analysis, research is conducted on residues and b-functions. By the usage of residues, polylogarithm and zeta function are studied.

Biophysics, Bioimaging

Biomolecules are nanometer-sized molecular machines working in living cells. Our research goal is to elucidate the operating principle how biological molecular machines work efficiently in collaboration with water molecules.

Molecular Biology, Cell Biology, Immunology

Immune cells act to protect us from disease-causing agents by attacking them. Cancer cells move from the primary lesion to other organs and proliferate. Research is conducted on the mechanisms of how cells move around inside the body and work in a specific location.

Condensed Matter Physics (experiments)

In the field of condensed matter physics, it’s possible to conduct research by creating one’s own specimens and measuring these. It is interesting in a completely different way than mega science. The goal here is to discover new physical phenomena and new matter, as well as solve long-debated mysteries of science.

Mathematics, Algebraic Analysis, Microlocal Analysis

The field of specialty here is algebraic analysis, which grew out of research into differential equations. Using combinatorics and microlocal analysis, research is conducted into reversion formulas of radon transforms of constructible functions, and the behavior of images.

Organic Synthetic Chemistry, Development of New Organic Reaction

Physical Chemistry, Molecular Science, Spectroscopic Analysis, Molecular Spectroscopy

Researching photo-physics based on fundamental spectroscopy research. Also developing analytical methods by observing spectra to extract information such as the attributes and amounts of a substance based on the interaction of the substance with light.

Biophysics, Chemical Physics, Structural Chemistry

Protein comes in various complex structures in the body in order to perform its functions. On the other hand, it easily changes form and loses its functions. These structural changes are observed using the world’s brightest X-rays in order to understand the mechanisms behind the formation of protein structures.

Organic Chemistry, Bioactive Natural Products, Organic Synthesis

Developing methods to synthesize compounds that inhibit infection and replication of HIV (AIDS virus) and influenza viruses, and compounds that scavenge radicals (such as reactive oxygen species) that have been attracting attention in connection with aging, cancer, etc.

Graph Theory

Most discrete structures can be expressed in graph form. Graph theory represents a major research field of discrete mathematics. Here, research is conducted into extremal graph theory, which is the relationship between invariants and local substructures of the graph.

Theoretical Particle Physics

We study a lot of new physics possibilities motivated by mysteries in our universe and discuss which models are realistic to explain the latest experimental results. We explore for unknown physics beyond the Standard Model of elementary particle.

Computational Chemistry, Bioinformatics, Protein-protein interaction, Infections, Drug Resistance, Molecular Evolution

We aim to elucidate various phenomena in the life sciences, including molecular evolution, drug susceptibility, and protein-protein interactions, using computational chemistry and bioinformatics that utilize computers and supercomputer.

Molecular biology, Human genetics, Genome analysis, Mitochondria

Human genome is the master blueprint of the human body. We investigate how gene mutations cause diseases. It aims at the elucidation of disease pathology and the development of drug discovery research using genome analysis and genome editing technology.

Anatomy, Developmental Neurotoxicology, Congenital Anomaly

I would like to clarify the influence of maternal environment during pregnancy on the development and development of children. In addition, I aim to prevent birth defects and contribute to the healthy growth of children. I would like to engage in the development of human resources who wish for the birth and growth of children who will lead the next generation.

Structural Biology, Thermodynamics

The function of proteins depends on its native tertiary structure. In order to clarify their function mechanism and regulate their function, we perform the structure determination of proteins and thermodynamic analysis.

Knot Theory

Research is conducted into knot theory and low-dimension topology (3D and 4D). To investigate knots mathematically, often the invariants of knots are used. Research takes an interest in the relation between the algebraic properties of invariants and the geometrical properties of knots.

Observational cosmology, Astrophysics, Gravitational lensing

Strong gravitational lenses are valuable phenomena for studying astrophysics and cosmology. Lensing is a unique probe of the (dark) matter distribution at large-scale and also can act as a natural telescope that magnifies the background sources, allowing for detailed studies of their properties at high resolution. This phenomena appear as a unique probe of the dark matter structure of galaxies, groups, and clusters, as well as an independent tool for constraining cosmological parameters.

Theory of condensed matter physics, Numerical simulations, Tensor networks

Cosmology, Astrophysics

The universe is mainly composed of unknown "dark matter" and "dark energy". Their nature have not been understood. Investigating the nature is important to understand the universe and test the Einstein's theory of general relativity. We will investigate the nature by carrying out gravitational lensing analysis of simulations and multi-wavelength data.