TQM(total quality management) is accepted as the powerful and holistic management innovation tools in the worldwide corporations since "Malcom Baldrige National Quality Award" model is established by US government. But nowadays, TQM′s roles and positions for the competitiveness is challenged from other many management innovations tools. This paper identifies the TQM′s roles and positions as the sources of sustainable competitive advantages through the examples of Japanese manufacturing corporations which enjoy the strongest positions since 1980′s in world market.