Researchers of the 1945 Battle of Okinawa agree that the Imperial army "forced and steered" civilians to commit mass suicide during the only full-scale ground battle in Japan during World War II, an authority on modern Japanese history said Tuesday.

Hirofumi Hayashi, a professor at Kanto Gakuin University in Yokohama, said he conveyed the view in a statement handed to the government's textbook-screening panel, which is considering requests by publishers to reinstate references about the military's role in forcing civilians to commit suicide, in some cases involving children, invalids and the elderly.

Hayashi said he responded to a request from the Textbook Authorization Council, which advises the education minister, and had asked a number of researchers on the battle to file their opinions.