Takashi KunifujiTakashi Kunifuji is Principal Chief Researcher of the Research and Development Centre of JR East Group at East Japan Railway Company, Japan. He has been engaged in research and development of railway signal control systems since 1998, and worked in te maintenance, design, and construction of signalling systems from 1992 to 1998. He received his Ph.D. degree in Engineering from the Tokyo Institute of Technology, Japan in 2011. Read More Read Less