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T. Natori is a pioneering researcher in the field of bipedal robotics, with a focused expertise in impact force reduction and stable gait control for legged locomotion. His major contributions center on the innovative use of redundant leg mechanisms—introducing extra degrees of freedom beyond traditional hip, knee, and ankle joints—to decouple and suppress the destabilizing impact forces that occur when a swinging leg contacts the ground. Natori’s foundational 2000 paper, "Impact force reduction for biped robot based on decoupling COG control scheme" (17 citations), established a novel decoupling control system that enables smoother, more stable walking. He further advanced this concept in his 2003 work (6 citations) by proposing a unified decoupling control method for redundant-legged bipeds, and in 2002 (2 citations) by detailing a structural approach to impact mitigation. Though his citation counts are modest, Natori’s work is notable for its forward-thinking integration of mechanical redundancy and control theory, laying early groundwork for modern humanoid robot stability. His research remains a valuable reference for engineers tackling the fundamental challenge of dynamic balance in bipedal locomotion.