Satoru Goto received B.E. and M.E. degrees in Applied Physics from Osaka University, Osaka, Japan, in 1988 and 1990, respectively, and Ph.D. degree from Osaka University in 1995. Since 1990, he has been with the Faculty of Science and Engineering, Saga University, Saga, Japan, where he was a Research Associate from 1990 to 1996, a Lecturer from 1996 to 1998, an Associate Professor from 1998 to 2007 and a Professor since 2007. Robot arms have been developing since 196o's, and those are widely used in industrial factories such as welding, painting, assembly, transportation, etc. Nowadays, the robot arms are indispensable for automation of factories. Moreover, applications of the robot arms are not limited to the industrial factory but expanded to living space or outer space. The robot arm is an integrated technology, and its technological elements are actuators, sensors, mechanism, control and system, etc.