Eight Tokyo university students attacked by a hammer-wielding woman in a classroom are recuperating and none required hospitalisation, their school has said.

At least eight students were injured in a hammer attack at a university in Japan's Tokyo city on Friday, media reports said.

Eight students were wounded on Friday in a hammer attack at Hosei University's Tama Campus in Tokyo, Japan, according to international media reports. A 22-year-old female student of sociology was arrested in connection to the attacks,