|1996 March 31||Graduated from Osaka University School of Engineering, Department of Information and Communications Technology.|
|1998 March 31||Completed masters course in communication engineering at Osaka University Graduate School of Engineering, Department of Information and Communications Technology.|
|1998 April 1||Employed by Japan Telecom Co., Ltd., Information and Communication Laboratories, to work on network agent R&D.|
|2000 November 1||Sent to British Telecom Laboratory (then BTexact). Engaged in R&D on next-generation network management.|
|2002 December 1||Japan Telecom Laboratory. Engaged in research on network security, Web applications, Web service platforms.|
|2006 October 1||Softbank Telecom Corp. Laboratory (change of company name).|
|2007 October||Recognized as a Super Creator by the IPA New Software Creation Project.|
|2008 September to 2009 March||Specialist member of the Information Grand Voyage Project.
Currently undertaking studies of public and commercial services relating to cell phone-based lifelogs.
Regular member of the Institute of Electronics, Information and Communication Engineers.
Mr. Yoshii is studying the technological and system aspects of public and commercial services relating to cell phone-based lifelogs. In 2009, he was involved in study of cell phone location information history and system aspects. This was part of a Ministry of Internal Affairs and Communications project on promoting establishment of rules for ICT application (Cyber Special Zones). The study aimed at setting rules relating to time-space information.
Additionally, in 2009 Mr. Yoshii was engaged in the Kyoto Tourism Promotion Project. This project focused on using ICT in measures for stimulating tourism industry. It was conducted as part of the Ubiquitous Special Zone Project, a government-sponsored project for establishing the foundations of an economy and regional revitalization via ICT.