Ryo Torii's main research interest is the application of integrated computational biomechanics and in vivo imaging to problems in clinical science and practice, particularly in cardiovascular area. The aim is to identify the roles of mechanical factors in the cardiovascular system in health, disease and post-operative conditions especially in relation to atherosclerosis, aneurysm and valvular diseases. His approach includes medical image processing, morphological analysis, computational fluid and solid mechanics, fluid-structure interaction analyses, and ex vivo tissue tensile tests.