Chuta Ito enunciated an architectural theory in the lecture of "The future of Japanese architecture from the view point of principles of architectural evolution" in 1908. The theory has been considered to be the first one on the architectural creation in modern Japan. The present author presents some new facts or interpretation as to the origin and the history of the theory as follows. The popular view of the theory which was originated from the Spencer's theory of social evolution is not necessarily correct. The theory was originated from Ito's own "The Architectural Philosophy" of his graduation thesis. Ito made the theory by succeeding to Kingo Tatsuno's discourse and by referring to Tensin Okakura's essays and opinion of Japanese fine art.