The Imperial Japanese military used money to cover up its use of sex slaves on Bali during the war, a group of researchers from Kanto Gakuin University has said, citing a document found at the National Archives of Japan.

A Japanese chief warrant officer stationed on the Indonesian island during the war told a Justice Ministry investigation in August 1962 that he brought about 70 women to the military brothels.

According to the document, about 200 more women were also taken to the brothels.