Koichi Hayashi was born in Kagoshima, Japan, in 1968. He obtained his B.Sc. (1990) and M.Sc. (1992) degrees from Kyushu University, and D.Sc. (1996) degree from Kyoto University. He was a research associate in Kyoto University (1996–2000) and Tohoku University (2000–2003). Then, he promoted to an associate professor (2003–2015) in Tohoku University. He moved to Nagoya Institute of Technology as a full professor in 2015. He has been engaged in developments of new X-ray analysis methods to date. Recently, he has investigated local structures around dopants in state-of-the-arts materials by means of XFH. In November 2020, he launched a huge national project (JSPS Grant-in-Aid for Transformative Research Areas (A)) of “Hyper-ordered Structures Science” as a representative.

• From point defects to defect complexes.- Topological order and hyperorder in oxide glasses and liquids.- Atomic-resolution holography.- X-ray and neutron pair distribution function analysis.- Angstrom-beam electron diffraction technique for amorphous materials.- Dynamics.- Property measurements of molten oxides at high temperature using containerless methods.- Density functional theory calculations for materials with complex structures.- Molecular dynamics.- Reverse Monte Carlo modeling of noncrystalline and crystalline materials.- Structural-order analysis based on applied mathematics.- Machine learning.- Dielectric Materials with Hyperordered Structures.- Hyperordered Structures in Microporous Frameworks in Zeolites.- Glasses with hyperordered structures.- Biological materials.- Battery and fuel cell materials with hyperordered structures.- Superconductors with hyperordered structures.- Ordered and disordered metaloxide for biomass conversion.