Yasunori Fujii received his PhD on the analogy between the strong interaction and the electromagnetic interaction, from Nagoya University in 1959. Between 1963 and 1992 he did research on the theory of particle physics and gravity, including pioneering work on the idea of non-Newtonian gravity, at the Institute of Physics, University of Tokyo. During this period, he also spent two years at Stanford University and a year at Purdue University. He is currently emeritus professor at the University of Tokyo-Komaba and continues to pursue his research interests at the Nihon Fukushi University.
Kai-Ichi Maeda received his PhD from Kyoto University in 1980. He and his contemporaries created a new research group in Kyoto, which was at the root of numerical relativity research in Japan. In 1983 he became a postdoctoral student at SISSA, Trieste working under Dennis Sciama. He moved to the Meudon Observatory in Paris in 1987 and worked on black hole solutions in string theory. In 1989 Professor Maeda became affiliated with the Department of Physics at Waseda University. Since 1998, he has been the associate editor of the Journal of General Relativity and Gravitation, and also the vice-chief editor of the Journal of the Physical Society of Japan since 2001.