Annoyed Japanese Army

My sister has a friend who claims that she has sixth sense, the ability to see ghosts. Lets call her M. M was involved in an activity which required students to stay over night in the school. Hence, the girls stayed over in a classroom. M had a friend who is very talkative and noisy. She loves to talk so much and that very night, it was very late. Her voice broke the silence of the night and M asked her to keep quiet because something was wrong. This noisy girl refused and kept on asking for the reason for the shut up. M said something was lurking outside the window and she should keep quiet. This girl refused and walked towards the window. She opened the window and refuse to quiet down, talking to her friends loudly from the window. The next morning, M confronted this girl. M said when she opened the window, there were dead Japanese soldiers lining up in front of the window looking at her and looked unhappy. The were annoyed with the noise she made.