M.S., The University of Tokyo, Electronic Engineering
Ph.D., The University of Tokyo, Electronic Engineering
1996 Executive Senior Researcher, NTT Laboratories
1998 Professor, Department of Electrical and Electronics Engineering, Faculty of Science and Technology, Sophia University
2004 Councilor, Sophia University
2012 Visiting Professor, Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University
Past Member of Information and Communications Council, Ministry of Internal Affairs and Communications
Fellow, The Institute of Electronics, Information and Communication Engineers (IEICE)
IEEE Life Member
Mobile Personal Intelligence (author and editor) (published by Kyoritsu, 1996)
Encyclopedia of Mobile Communications (co-author) (published by Maruzen, 2000)
Mobile Global Communications (co-author) (published by Corona, 2001)
5G Textbook (author and editor) (published by Impress, 2018)
5G Textbook, the Second Chapter (author and editor) (published by Impress, 2023)