Riku Sanjo is a Japanese writer. He graduated from Meiji University. He has worked as both a story writer for manga, anime, as well as several live-action tokusatsu TV shows. He was the head writer of Kamen Rider W and Kamen Rider Drive. He was later one of the secondary writers on Kamen Rider Fourze and head writer of Zyuden Sentai KyoryugerIcon-crosswiki. He also played the Sweets Man in Kamen Rider Returns: Kamen Rider Eternal. He is also a secondary writer of the Satria Series (Knight Series): Satria Garuda BIMA X an Indonesian tokusatsu series created by Ishimori Productions .

(source: Wikipedia & Kamen Rider Fandom)