BSc and MSc in Mechanical Engineering, Keio University in Japan; 2012, PhD, MIT. 2005, started to work on human biomechanics and development of transtibial prosthesis as a PhD student, Biomechatronics group, MIT Media Lab; concurrently, taught a course to develop orthopaedic devices for developing countries as an instructor of MIT D-lab. Currently Associate Researcher, Sony Computer Science Laboratories, working on human physical augmentation with robotic technology. Director, D-Leg, targeting design and dissemination of appropriate orthopaedic technology; President, See-D, which organizes an appropriate technology business workshop and contest. Named one of the world's most outstanding innovators under the age of 35, Technology Review, TR35 (2012).