Takashi Nabeshima is a professor in the Department of Electric and Electronic Engineering, Oita University, Japan. He received his B.S. and M.S. in electronic engineering from Kumamoto University, Japan, in 1975 and 1977, respectively, and Dr. Eng. from Kyushu University, Japan, in 1983. He has published more than 70 technical papers in IEICE Transactions and IEEE Transactions and participated in various international conferences in the field of power conversion. His research interests include switching converter and control technique.