I am a dentist and researcher specializing in dysphagia rehabilitation, oral frailty, and the functional assessment of oral and swallowing muscles. My research focuses on the physiology, evaluation, and rehabilitation of the oral and suprahyoid muscles involved in swallowing. In particular, I have investigated tongue pressure and jaw-opening force as objective indicators of swallowing muscle strength and potential screening markers for dysphagia. My work has contributed to clarifying age-related changes in swallowing muscle strength across adulthood through large-scale cross-sectional studies. I have also explored the relationships among tongue morphology, muscle quality, and masticatory function using quantitative approaches such as ultrasonography and myotonometry. These studies aim to better understand the structural and functional characteristics of oral muscles and their clinical relevance to mastication and swallowing. In addition, I have investigated therapeutic approaches for dysphagia rehabilitation, including tongue-pressure resistance training, jaw-opening and jaw-retraction exercises, and neuromuscular stimulation techniques. My research also addresses interventions for oral frailty, focusing on strategies to maintain and restore oral function in aging populations. Recent work has expanded to community and home-care settings, including telemedicine-based dysphagia rehabilitation and studies on the relationship between mastication, swallowing performance, and eat