Dr. Hiroyuki MATSUURA is an Associate Professor in the Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo. He has put major effort into the fundamental understanding of physical chemistry in pyrometallurgical phenomena, mainly focusing on hot metal pretreatment, BOF, and secondary refining in ferrous manufacturing. One of his significant achievements is the elucidation of non-metallic inclusion in various steelmaking processes, such as the inclusion formation in deoxidation reaction and the modification of inclusion in molten steel during secondary refining, secondary precipitation during solidification of molten steel, and the further evolution of inclusion accompanied with the microstructure change during reheating process. He has made more than 120 publications and 100 international conference presentations. Currently, he serves as an Editorial Board of the Journal of Iron and Steel Research International, an Associate Editor of Tetsu-to-Hagané and ISIJ International, and a Key Reader of Metallurgical and Materials Transactions B.