Kenji Sakurai is an honorary researcher at the National Institute for Materials Science and a professor emeritus at the University of Tsukuba after his retirement in March 2020. Currently he maintains a private laboratory, the Imaging Physics Laboratory, in Tokai, Ibaraki, near the nuclear reactor and large accelerator facility. His research interests include the development of new frontier analytical imaging methods and instrumentation using x-rays and neutrons (especially those used to solve problems related to surfaces and interfaces), as well as research on non-crystalline solids and some inorganic crystals. X-ray color imaging is one of the innovative works. Wenyang Zhao, born in 1993, received the degree of Doctor of Engineering in 2020 at Kenji Sakurai’s lab at the University of Tsukuba. He is currently a postdoctoral researcher at RIKEN Center for Computational Science, Kobe, Japan. His research interests are in utilizing the power of high-performance computation to interpret experimental imaging data.