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Yoshihiro Kanjo is a pioneering researcher in industrial robotics, specializing in the automation of heavy fabrication processes, particularly for steel bridge construction. His work addresses critical challenges in heavy industries, including labor shortages, aging workforces, and workplace safety, by developing intelligent robotic welding systems. Kanjo's major contributions center on the integration of CAD/CAM technologies with multi-robot welding systems, notably the systemization of bridge panel fabrication at NKK's Tsu Works, where 26 arc welding robots were deployed in a landmark 1992 project. His research on collision avoidance for large structures, using potential field methods and human experience modeling, has advanced the safe and efficient operation of robots in dense, complex environments. Kanjo also explored robust scheduling in multi-robot systems to prevent collisions and optimize productivity. While his citation counts (ranging from 2 to 8) reflect a focused, industry-oriented impact rather than broad academic reach, his work has been instrumental in transforming manual, skill-dependent welding into automated, programmable processes. Kanjo's achievements exemplify the practical application of robotics to solve real-world industrial problems, making him a key figure in the evolution of automated heavy manufacturing.