Upon graduating from Keio University's Faculty of Environment and Information Studies, Yuji Okada joined the video game company Polygon Magic, Inc. He began as a project manager for console and arcade games, later moving on to help create a social games division and Derby x Derby. After working in conjunction with GREE, Inc. to develop Sengoku Kingdom, Okada transferred to GeePlus, Inc., a joint venture between Polygon Magic and GREE. There he led the Production Section, developing games and supervising live operations while also hiring, educating, and managing staff.
