Sorayama started his illustration career in Tokyo painting Sexy Robotic forms, objects and pin-up. Intrigued by the effects of light on various metallic surfaces, and always ready for challenges to his technique and imagination, Sorayama began to produce a series of female robotic figures in the late 1970¹s; anatomically correct in form, but appearing to have been fashioned of molten silver. The term "Sexy Robot" was coined to describe them. In 1993 George Lukas' visual effects director Mark Dippe, of Star Wars fame / Industrial Light and Magic (ILM) was the first to invite Sorayama and his art into North America. This to speak before Mr. Lucas' professional technical movie making staff. Sorayama art also appeared in major magazines since the late 1970s and in the 90s Playboy TV Sextera and Penthouse Magazine featured his arts. Major art books were published from the 1980s to present with "MasterWorks" and "Vibrant Vixens" released in 2010 and 2013.
In the late 1990's, Sorayama was approached by the Sony Corporation's Dr. Doi to design an organic robotic form shape. It became the famous "AIBO" dog, now in the collection of the Museum of Modern Art and then Smithsonian Institute of Technology Museum. In 2006, AIBO was added into Carnegie Mellon University's "Robot Hall of Fame" with the description "the Sony AIBO represents the most sophisticated product ever offered in the consumer robot marketplace." The book, "Objects of Design" features Sorayama's AIBO art on its cover and interior.
The term "Gynoids" was created by the female British SF writer, Gwyneth Jones, and developed by another British writer, Richard Calder. The word is a combination of "droid" (greek "in the image of") and "gyn" (greek "woman").These female cyborgs of Sorayama combine elements both human and mechanical. The soft, sensuous body parts are cleverly intertwined with inorganic, machine-like connections and protrusions to create entrancing images which embody complex and subtle tensions.