Hiroyuki Chihara is a Japanese mathematician who had been working on partial differential equations and geometric analysis, in particular the analysis of dispersive partial differential differential equations on the Euclidean space and dispersive flows from Riemannian manifolds to almost Hermitian manifolds. He thought it was interesting to see the invisible inside by measuring the outside, so he started research on microlocal analysis of integral geometry in 2020. Roughly speaking, this is an area of mathematics research related to the mathematical principles of CT scanners. He is also interested in medical imaging, security inspection, seismology, ocean science, non-line-of-sight imaging, data science, computational science and other applied mathematics related to his current research field. He usually prefers computers with Debian based operating system such as Ubuntu, and likes software such as MATLAB, Julia Programming Language, Mathematica and Maxima. He is currently a general member of AMS and SIAM.

College of Education, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan