Live footage on NHK showed a line of emergency vehicles with flashing lights at the campus in the suburban Machida district of the Japanese capital.
There are occasional stabbings and sometimes even shootings in Japan, including the assassination of former prime minister Shinzo Abe in 2022.
In December, a junior high school student was stabbed to death and another wounded at a McDonald’s restaurant in southwestern Japan. A man was later arrested over the attack.
In 2019, two people including a schoolgirl were stabbed to death and more than a dozen wounded in the Japanese city of Kawasaki in a rampage by an attacker who targeted children as they waited for a bus.
The 51-year-old attacker slashed at a group of children before fatally stabbing himself in the neck.
- Agence France-Presse