This article explores the activities and experiences of a women's peace museum in Japan which especially tries to pass on the history of Japan's military sexual slavery, or the "comfort women" issue. The system of Japan's military sexual slavery had not been written as a part of history until courageous survivors testified and documentary evidence was unearthed in the 1990s. With few material exhibits of sexual violence, testimonies play a significant role in the exhibitions. Panels displaying the testimony of both survivors and former soldiers try to represent the person as a whole, situating sexual enslavement or crimes as part of their overall life, rather than extracting the harsh experience in an isolated way. The concrete and detailed activities of this privately run museum show the challenges faced by museums dealing with the dark history of their own country.