Company
About Gemini
Management
Hiroshi Ohta
Chief Executive Officer and Co-Founder
Hiroshi Ohta is a well known mobile internet pioneer and visionary. For well over a decade at J-Phone, Vodafone Japan, and now Softbank Mobile, he led the development of many "world first" products and services in the mobile communication industry. He led the launch of Skywalker Wireless Internet messaging, world's first photo mail service "Sha-mail", J-Sky Mobile Internet service, world's first location based service J-Sky Station, J-Navi (GPS service), and MIDP extensions which enabled 3D mobile Java gaming, to name a few. Many of them evolved into global-standard services and technologies. At Gemini, Mr Ohta led the specification and development of the first pan-European Vodafone Live! service in Dusseldorf, Germany. Mr Ohta was the recipient of numerous government awards for his outstanding contributions to the telecommunications industry.
Michael Tso
Chief Operating Officer and Co-Founder
Michael Tso holds 28 patents in mobile and wireless technology. Prior to his COO role, Michael served as CTO and President of Gemini Japan. Michael was Wireless Chief Scientist at Inktomi, where he designed a congestion control system for KDDI which later became a WAP standard. At Intel, he led the development of web acceleration technology and collaborated with Nokia on NarrowBand Sockets, commonly known as SmartMessaging, which enabled the world's first SMS ringtone download service. Michael also participated in Ubiquitous Computing research at Xerox's Palo Alto Research Center, including the PARCTab, the world's first wireless, location aware, wearable tablet computer. Michael graduated from MIT with an MS in Computer Science and Electrical Engineering, BS in Computer Science, BS in Electrical Engineering, and a minor in Economics.
Shiro Tsuda
Executive Advisor
Shiro Tsuda is a well-known communications pioneer who led the creation and growth of the mobile market in Japan. He became part of the small founding team of NTT DOCOMO in 1992. He assumed top positions with DOCOMO, including Corporate Planning, Network, and International Business Units and ultimately became its Executive Vice President. He led the development of i-mode and the first 3G deployment in the world. He was selected as one of the 20 most influential people of the year by the Time magazine in 2003. In 2004 he joined Vodafone Japan (now SoftBank Mobile) as President and then Chairman where he was able to strike the ideal balance between a global standard-based 3G deployment and localization of 3G service in Japan. He has been an Executive Advisor of Gemini since 2007.
Giorgio Propersi
General Manager, Americas and EMEA
Giorgio Propersi has full P&L responsibility for the Americas and EMEA, including Marketing and Strategy, Sales, Product Management, Account Management and Technical Support. Giorgio has more than 30 years of experience in complex computer and communication systems, with a solid track record of growing extremely successful companies out of simple ideas and great people. Giorgio founded and grew three successful companies: Trillium Digital Systems (data communications standard protocols, acquired by Intel); Angeli Systems Corporation (directory services, LDAP, X.500, acquired by ISOCOR); and Sourcecom (the first integrated DSL devices, acquired by ACT Networks which then became Clarent, the VoIP leader). In addition, Giorgio was VP Engineering and Founder of uXcomm (distributed server monitoring and control) and the Founder and COO of iVox Networks (the first optical IP media gateway). At the beginning of his career, Giorgio designed, developed and deployed the most powerful X.25 router in the market, which became the backbone of the AT&T data network in the '80s. Giorgio holds a Ph.D. in Telecommunications/Computer Science from the University of Rome, Italy.
Gary Ogasawara
Global R&D
Gary Ogasawara heads up Gemini's global development and QA team, with operations in Silicon Valley, Tokyo, and Beijing. Gary has over 15 years of hands on engineering management experience at startups and larger companies. Gary has led the development of all of Gemini's products and their worldwide carrier deployments. Prior to Gemini, Gary was Director of Engineering at e-Centives, an e-Commerce search engine company. He also led the development of real time commerce and advertising systems at Inktomi, a leading Internet search engine and CDN gateway company. Gary holds a Ph.D. in Computer Science from the University of California at Berkeley, where he specialized in Bayesian decision theory, uncertainty reasoning and machine learning.
Shinya Motohashi
Corporate Strategy and Business Development
Shinya Motohashi has over 25 years of experience in corporate planning and management at Japan's biggest telecom operators. After graduating from Hitotsubashi University, he joined KDD (now KDDI) and held key posts in corporate management, including service planning, corporate planning, and corporate secretariat office for two decades. As part of Vodafone's global strategy team, Motohashi was responsible for the development of corporate strategy in Japan. At Softbank Mobile, he led its WiMax efforts and was the creation for a joint venture with eAccess/eMobile. He obtained an MBA at University of Southern California.

