The underwater environment is said to be humanity’s final frontier. Information on the seabed, including the presence of hitherto unidentified organisms and undetected resources, as well as geological insights into submarine earthquakes, is extremely important for the survival of humanity. To facilitate information gathering therefor, the development of unmanned robots for marine exploration is currently underway around the world. The untapped resources lying dormant in the seabed are of particular interest. While Japan is said to be a resource-poor country, its territorial waters and exclusive economic zones together rank sixth in the world in terms of geographical area. The evolution of marine robotics holds immense potential for discovering these novel marine resources.