Nano-JASMINE is a 50cm class micro satellite that has space astrometry mission for the first time in Japan. Making a map of many stars, Nano-JASMINE will take us a knowledge of our Galaxy, and techniques of observation. Intelligent Space Systems Laboratory (the University of Tokyo) that took two CubeSats and one Micro-Satellite into orbit covers bus system, and National Astronomical Observatory of Japan (NAOJ) that plans more precise missions by larger satellites covers mission telescope.