Born in 1993, Kai is a social entrepreneur who tackles poverty issues internationally from both research and practical sides. After studying development economics at Hitotsubashi University and the University of Toronto,
he worked as a researcher at a private thinktank and an international organization. Kai founded Renovate Japan, LLC in October 2020. The Tatenaoshi projects in that company focus on rescuing people who lost their jobs and homes through unemployment or domestic violence, by providing them a shelter that makes use of buildings during renovation as they are not yet in the market.