I worked at R&D sector of KDDI for 9+ years, focusing on the efficiency improvement of 3G system/mobile packet network and value-added ubiquitous services for mobile. At 2007, I joined Mobile Technical Planning Division of KDDI to lead the realization of ubiquitous network with some cross-departmental projects like 3G femto, 4G data and VoLTE launch. During 2016-19, I conducted the modernization of the 4G Radio and Core Network with nationwide coverage as CTO of Mobicom, Mongolia. At 2020, I joined KDDI Digital Life, the subsidiary of KDDI, to explore the "digital telco" domain. Master of Engineering, Kyoto University, Japan