In order to understand mechanisms of coseismic rupturing of earthquake faults, to characterize reservoirs of petroleum, natural gas and methane hydrate, as well as to ensure safety of carbon capture storage (CCS) and high level radioactive waste disposal, I am carrying out experimental geomechanics and prtrophysics research in an interdisciplinary area between geoscience and geoengineering. My main research topics are: 1) evolution of in situ stress in deep formation and rock masses by measuring anelastic strain recovery (ASR) of drill core samples and analyzing logging data from deep drillings, 2) measurements of rock physical properties under high pressure and high temperature condition, and 3) developments of measurement method of in situ stress and rock physical properties.