Mobile communication is heading to 5G era, and intensive efforts are going on to make it reality. It is expected that the 5G mobile network will provide Ultra wide bandwidth, Ultra terminal density, and Ultra short response time, which meet to the social requirements to networks. This was subject to the keynote speech “Core network in 5G Mobile era and ICN” in IEICE INTF 2017 By Toshitaka Tsuda, Guest Professor at Waseda University