The eight who were hurt received medical treatment and ended up requiring no hospitalisation, Hosei University said in a statement late on Friday. "We will cooperate with police investigations and care for students and faculty shocked by the incident," the institution said, adding efforts would be made to "ensure campus safety". Violent crimes are rare in Japan due in part to strict gun control. But there are occasional stabbings and shootings, including the assassination of former prime minister Shinzo Abe with a homemade gun in 2022. In December, a junior high school student was stabbed to death and another wounded at a McDonald's outlet in south-western Japan. A man was later arrested over the attack. In January 2022, three people were stabbed outside the prestigious University of Tokyo before nationwide college entrance exams.