Prince Hisahito and his parents Prince Akishino and Princess Kiko pose for photos at Ochanomizu University junior high school in Tokyo. File / Koji Sasahara / AFP
Two kitchen knives have been found at the school desk of Japan's Prince Hisahito, grandson of Emperor Akihito, with security camera footage showing a suspicious man trespassing on the grounds, media reported on Saturday.
The incident comes as authorities are beefing up security ahead of the popular emperor's abdication next week after a 30-year reign.
Officials of the Tokyo junior high school found the knives on Friday at the desk used daily by the 12-year-old prince, public broadcaster NHK and other news reports said, quoting unnamed investigators.
Hisahito, who began attending the school this month, was not in the classroom when the knives are believed to have been left.
There were no reports of any injuries or damage at the school, the reports said, adding that police did not find any threatening note related to the case.
Security camera footage showed a man with a helmet trespassing on the school grounds at around noon, they said.
Police were searching for the middle-aged man who was dressed as a construction worker.
A police spokeswoman declined to comment while no immediate confirmation was available from the school.
Threats to the imperial family are relatively rare. In 1975, Akihito was almost hit by a Molotov cocktail in Okinawa, a major World War II battlefield where there was strong anti-emperor sentiment.
The incident comes as Japan is preparing for the abdication on Tuesday of Akihito, the first monarch to relinquish the throne of the world's oldest imperial family for two centuries.
Akihito's eldest son, 59-year-old Crown Prince Naruhito, will take the throne the following day in a series of ceremonies.
Hisahito is the son of Naruhito's younger brother and the last eligible male heir.
Japan's centuries-old succession would be broken if Hisahito does not have a male child as the Imperial Household Law, in place since 1947, does not allow women to ascend the Chrysanthemum Throne.
With skateboarding making its Olympic debut in Japan next year, Cuban skateboarders are hoping their sport will finally be accepted at home.
Yoshiro Mori announced his surprise resignation as honorary chairman of the Japan Rugby Football Union, officials said on Thursday, just months before the country hosts the World Cup.
Newly crowned Masters champion Tiger Woods announced on Thursday he will return to Japan for the first time in more than a decade to play in a new US PGA Tour event in October.
Summary: "Today marks a new chapter in our journey for the development of peaceful nuclear energy with the issuing of the operating licence for the first Barakah plant," His Highness Sheikh Mohamed Bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, said in a tweet
The UAE has led the way in setting plans for the future. The only issue is that the technology is changing very fast. We still have progress to make in terms of changing the mindset, especially among government agencies that refuse to share their data — even with other departments, said Dr Saeed Al Matrooshi, CEO and Secretary-General at the Ajman Executive Council.
She signed up for the Little League because she loved the American sport, only to be rejected because she was not a boy.