Hirofumi Hayashi, a professor of history at Kanto Gakuin University, said he found seven items while combing through the massive storehouse of documents submitted during the 1946-1948 "Tokyo Trials" of war criminals.
One document, written by Dutch prosecutors and dated March 13, 1946, quoted a Japanese civilian employee of the Japanese army who said an officer made local women in occupied Borneo stand naked and slapped them in the face.
"We detained them under orders of the chief security officer to find excuses to put them into brothels," the Japanese employee was quoted as saying, according to Hayashi.
Another document also includes testimony by a Japanese lieutenant, who said the army forced women into sexual slavery on Indonesia's Moa island, he said.
"It says that it was in retaliation for local villagers who attacked the Japanese force," he said. "The army killed 40 villagers and put six of their daughters into brothels."
However, Mr Abe has repeatedly said that Japan was responsible in a broader sense and that he stands behind a landmark 1993 apology to former comfort women.
This is cache, read story here