Prof. Ryuichi Yokoyama, an IEEE Fellow, is one of the most significant leaders of deregulation in power markets. Prof. Yokoyama’s foresight and advanced view on the power industry has promoted the introduction of competition and deregulation to power markets. His promotion from an IEEE senior member to an IEEE Fellow in 2009 was in recognition of his leadership in electrical power system management.

Prof. Yokoyama’s most recent major contributions have been designing and operating power systems and markets, including the development of highly efficient power supply using lean‐burn gas engines and power storage device, the creation of an efficient operation scheme that utilizes quadratic programming in fuel cell complex housing and the employment of the branch and bound method to identify obsolete equipment in aged substations to the optimization of power generation via suitable photovoltaic (PV) panels positioning and angling, and the creation of an independent grid system of micro grids by employing load frequency models.

For over 40 years, Prof. Yokoyama has been actively carrying out research work as well as publishing papers and reports to provide engineers and students with technical information that is practical and applicable to real systems. His fields of interest include planning, operation, and optimization of largescale environment and energy systems, and applications of advanced mathematical approaches to energy systems and markets.