Toshiyuki Masui is Professor of Faculty of Environment and Information Studies, Keio University, Japan. Before joining Keio University, he worked at many IT companies and laboratories including Fujitsu, Sharp, Sony, AIST, and Apple. For many years, he has been working on improvements of the user interface of computers, mobile phones, and information appliances in the coming age. In 2001, he developed a predictive Japanese text input system "POBox" for Sony's mobile phones, and the technology is now the standard input method on almost all the Japanese mobile phones. In 2006, he got headhunted from Apple for the development of iPhone's Japanese text input system, and his 'flick-based' Japanese text input method is now the standard for Japanese smartphones.
He is the inventer of the "Gyazo" image capturing service and the "Scrapbox" information management system provided by Nota Inc., Japan, where he serves as the CTO. Around 10M users are using Gyazo worldwide, and Nota acquired $2M from Japanese VCs for the service in 2014.
His current research interest includes text input techniques, information retrieval, information visualization, IoT technologies, and authentication techniques.