Photo/IllutrationOchanomizu University Junior High School in Tokyo’s Bunkyo Ward (Asahi Shimbun file photo)

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A suspected intruder planned to stab Prince Hisahito in his classroom at Ochanomizu University Junior High School in Tokyo, but the boy was outdoors for a gym class at the time, investigative sources said.

Kaoru Hasegawa, 56, admitted that he intended to harm Hisahito, second in line to the Chrysanthemum Throne, after entering the school in the capital’s Bunkyo Ward on April 26, they said.

He also said he was the one who placed two fruit knives on the 12-year-old prince’s classroom desk.

“I wanted the prince to know that I came here,” the sources quoted Hasegawa, who was arrested on April 29 on suspicion of intrusion, as saying.

Police said they believe Hasegawa did not know the prince’s schedule, and it was a coincidence that all of the students were outside for a gym class when the suspect entered.

The two knives were taped to the end of a 60-centimeter-long aluminum pole.

Hasegawa has not said why he targeted the young prince.

But sources said he has repeatedly criticized the imperial system during questioning.

“Under the imperial system, Japan cannot become a better country,” he is quoted as saying.

Police have found no records that Hasegawa belongs to a specific ideological group.

Hisahito is the only male among the three children of Prince Fumihito and Princess Kiko. He is also the sole grandson of Emperor Emeritus Akihito and Empress Emerita Michiko and the nephew of new Emperor Naruhito and Empress Masako.