Leon Giordana, a genius of the Italian Renaissance, created a notebook filled with various concepts and ideas that were centuries ahead of their time. (similar to Leonardo da Vinci) Giordana sent an original copy of his manuscript to Japan to the famed dollmaker Nami Uemono, who hid it away on a secret island in the south-eastern seas leaving behind the only clues to reach it within the kimono of two dolls he made around this time. While the dolls and the secret of the manuscript remained hidden for centuries, it's developments were known and utilized by the SGS, most notably in the creation of the "Parallel Engines" project Giordana thought up which would eventually lead to the creation of the technology of the Boukenger, including their powers and their vehicle mechs.