Sengoku X, refered to as Professor Sengoku, was the creator of the Sengoku Driver and the Genesis Driver. He builded a Sengoku Driver as well and a Lemon Lockseed, which allows him to transform into Kamen Rider Sengoku. Than he builded a Genesis Driver as well and a Lemon Energy Lockseed, which allows him to transformd into New Generation Rider Sengoku. In one episode, He became part of Hakaider