Takashi Natsume has been working in the IT industry for about 15 years and has been working for NTT corporation since April, 2013.He is engaged in system design of public cloud systems based on OpenStack and functional verification of OpenStack.Prior to joining NTT corporation, He was engaged in performance analysis and performance troubleshooting for systems.He was also engaged in performance verification and functional verification about Linux and middleware on Linux.He has a Master's degree of Engineering in Information and Communication engineering from University of Tokyo in 1999.