Author Profile

Kosei Takiishi

Kosei Takiishi

Sr Director Analyst

9 years at Gartner,  22 years' experience

Location:  Japan  |  Language(s):  English, Japanese

Roles and Responsibilities

Kosei Takiishi works in the TSP Industries team and he covers telecom markets and the Industry Product Planning and Strategy and Industry Strategy Execution Key Initiatives for Product Managers and Tech CEOs. Mr. Takiishi based in Tokyo, Japan and his current research interests include wireless technology evolution such as 5G/4.xG/4G/M2M/IoT/SDN/NFV/vRAN/private 4G/5G and related competitive landscapes.


Previous Experience

Before joining Gartner, Mr. Takiishi was a Senior Engineer responsible for mobile device development and frequency strategy at NTT Docomo. Prior to that, he was in the company's global business division to launch international roaming services (LTE, Wi-Fi, M2M) and contribute to GSMA standardization activities. He also worked as a researcher in NTT Docomo's laboratory to develop radio propagation algorithms, M2M and positioning systems.

Professional Background

  • NTT Docomo, Senior Engineer, 13 years


  • B.E., Electrical and Electronics Engineering, Tokyo Institute of Technology