Ryoko Sasamoto

Tokyo University of Marine Science and Technology

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About

Dr. Ryoko Sasamoto is a pioneering figure in deep-sea robotics, whose work has significantly advanced autonomous underwater vehicle (AUV) technology for scientific exploration. Her primary research areas encompass the design, development, and deployment of deep-sea AUVs, with a particular focus on enhancing maneuverability and operational endurance in extreme underwater environments. Sasamoto’s most notable contribution is the creation of the "MR-X1," a compact, fish-head-shaped AUV developed at JAMSTEC since 2000. Weighing just 800 kg and measuring 2.5 meters in length, the MR-X1 is engineered for high maneuverability, equipped with five thrusters and capable of reaching depths of 4,200 meters. Its 15-hour operational time, powered by a lithium-ion battery, marked a breakthrough in sustained deep-sea scientific work. Though her seminal paper on the MR-X1 has garnered 9 citations, its impact resonates through the foundational role it plays in subsequent AUV innovations. Sasamoto’s work exemplifies how thoughtful engineering can unlock new frontiers in oceanography, enabling researchers to explore previously inaccessible abyssal zones with unprecedented precision and efficiency.