Maruno graduated from Kuwasawa Design School in Tokyo. As an architect, he worked for world famous firms including Riki Watanabe, Shiro Kuramata, Shigeru Uchida, Aldo Rossi, and Akira Watanabe in Tokyo. As an artist, he studied under Beth Lipman at Urban Glass in Brooklyn as well as George Nama, Kathy Caraccio and Vincent Baldassano at the National Academy. He is a member of the Robert Blackburn Printmaking Workshop. Maruno has recieved numerous awards including the Col. Michael Jacobs Prize and the Ralph Wailer Exhibition Award, and he has shown his works at the University of Richmond Museum and at galleries in US, Australia, the Netherlands, Turkey and Japan.