Two knives were found near the desk of Prince Hisahito, the 12-year-old grandson of Emperor Akihito, at his junior high school, with security camera footage showing a man wanted in connection with the incident trespassing on school grounds, police said Saturday.
The footage shows a helmeted middle-aged man dressed in blue entering Ochanomizu University Junior High School on Friday around noon, according to the police.
Prince Hisahito, who began classes this month, was not in the classroom, which was empty at the time when the knives are believed to have been left there.