A 56-year-old man was sent to prosecutors Wednesday for allegedly trespassing on the grounds of Prince Hisahito's school, where he is suspected of leaving two knives on the boy's desk, a charge he has admitted to, according to the authorities.

The police tracked down Kaoru Hasegawa, who had been on the run for four days since Friday, by piecing together footage from surveillance cameras in various locations.

The incident took place as the country was preparing to celebrate the ascension of Emperor Naruhito to the Chrysanthemum Throne on Wednesday. Prince Hisahito is now second in line to the throne behind his father, Crown Prince Akishino, who is the younger brother of the emperor.