Enabling an innovative energy-saving, eco society that will change our lifestyles is the ultimate goal of the project, “Achieving Ultimate Green IT Devices with Long Usage Times without Charging,” (Program Manager: Masashi Sahashi), which was accepted as a program for “Impulsing Paradigm Change through Disruptive Technology Program (ImPACT).” This can be achieved by developing ultimate green IT devices with long usage times without charging by making each constituent of computer systems non-volatile, such as memory and information processing, and by creating ultra-low energy consuming states with innovative spintronics technology.