For the last 30 years,I have been engaged in studying plasma processing based on materials science,namely,plasma materials engineering.I started with the study of thermal plasma processing,especially plasma-particle interaction and co-condensation process of high temperature vapors,and then expanded to the ultrafine particle synthesis and to thermal plasma PVD,CVD and powder spraying for coating applications.10 years ago,I also started to utilize medium pressure plasma with an aim at super-high rate deposition of pure silicon,and found that the peculiar characteristic of this plasma is suitably called "Meso-plasma" as a new category of plasmas.Looking back my research carrier,the research field would be characterized mainly by the words:plasma and vapor condensation,and is fortunately fit to the recent global trend of materials R&D which is shifting from "monolithic" to "materials system" and from "bulk" to "thin film & coating",although this was not the case 30 years ago.