A 56-year-old man who was arrested over knives left on the classroom desk of Prince Hisahito at a Tokyo school has made critical remarks about the Japanese imperial system during interrogations, investigative sources said Thursday.Kaoru Hasegawa has admitted leaving the knives after he was apprehended Monday for allegedly trespassing on the grounds of the Ochanomizu University Junior High School attended by the 12-year-old heir to the Chrysanthemum Throne, according to the sources.Two knives were found on the desk last Friday, with security cameras capturing a helmeted man entering the scho…READ FULL ARTICLE