Jinfeng Yang is an Associate Professor of accelerator physics and materials science at the Institute of Scientific and Industrial Research, Osaka University, Japan. He has worked on the generation and applications of high-brightness femtosecond/picosecond pulsed electron beams in the particle accelerator field for over twenty years. He has published more than 100 papers in indexed scientific journals and international conferences. He developed a pulse radiolysis with femtosecond resolution. The development opened the first experimental study of radiation chemistry in femtosecond time regions. His current research is concerned with the development of ultrafast electron diffraction/microscopy with relativistic femtosecond electron pulses and the study of ultrafast phenomena including structural dynamics and chemical/biochemical reactions.