A 56-year-old man who was arrested after knives were left on Prince Hisahito's school desk in Tokyo has told investigators he intended to stab the 12-year-old heir to the throne, investigative sources said Wednesday.Kaoru Hasegawa admitted to leaving the knives and criticized Japan's imperial system after he was apprehended on April 29 for allegedly trespassing on the grounds of Ochanomizu University Junior High School, which is attended by the nephew of Emperor Naruhito, according to the sources.The prince and his fellow students were outside the classroom when the two knives were left.The…READ FULL ARTICLE