Kashima was born in Hiroshima, Japan. He received his BE and ME degrees in electrical engineering from the Yokohama National University, and his PhD in physical electronics from the Tokyo Institute of Technology. He joined the Electrical Communication Laboratory of NTT in 1975 and has been engaged in the research and development of optical-fiber structural design, fusion splicing, optical connectors, subscriber loop systems, and operation systems of optical cable systems. He is a member if the IEEE and the IEICE of Japan.