The basic theory and procedures for design and development for practical robotics and mechatronics are important for all students and engineers who wish to engage in the field. This book describes how to successfully create practical robotics and mechatronics, with an emphasis on marine, space and medical applications. New underwater vehicles, ships, robotic fish, unmanned aviation robotics, space robotics, and medical robotics are discussed, providing fruitful hints for creating new technologies.The author is one of the leading experts of modern robotics, with several prizes in the area and 30 years of experience of robotics development in Mitsubishi Heavy Industries, Ltd., JAMSTEC, and academia. Researchers in robotics and mechatronics in academia and industry will find this a useful and practical book. Advanced students in electronic engineering with a focus on robotics, mechatronics, or control will also find it of interest.