Sure, Japan is all about peace. Earlier in 2007, I traveled to Hiroshima with my classmates to learn about that atomic bomb and meet with hibakusha-radiation victims. (See my film on this trip here.) I've also heard somewhere that Japan has supposedly the largest number of peace museums in the world. Yet, due to the devastation of the atomic bomb, the Japanese state has perpetuated a victim consciousness that still remains strong today. Japan has never properly come to terms with the its responsibility for its past deeds.
However, there is one museum here in Tokyo which is aimed at educating the public of Japan's World War II aggressions against women. Over the weekend, my friends and I visited the Women's Active Museum on War and Peace in Waseda. WAM is dedicated to the issues of comfort women which is one of the most controversial topics when it comes to the Japanese aggression during World War II.

These comfort women were recruited through out the Japanese empire from rural areas to work in "comfort stations." Often under 20 years old, these women would be repeatedly raped throughout the day to "comfort" the Japanese military men. Even after the war was over, these women lived in shame and remained in silent suffering until 1991 when Kim Hak-Soon from Korea spoke out.
Demands for apology and compensation continues even today. Every Wednesday in Seoul, the comfort women victims from South Korean demonstrate in front of the Japanese embassy. While an apology was offered in the 1992 Kono Statement, the Japanese government has refused to claim any legal responsibility. As recently as March of 2007, when US Congress demanded that Japan offer a formal apology to the comfort women, Prime Minister Shinzo Abe stated, '"There is no evidence to back up that there was coercion as defined initially" in the role of "the Japanese military or government" in the recruiting of comfort women. '1

At the museum, you can browse through portraits of the comfort women, read their stories, learn about the fights and tribunals on their behalf, and watch an array of films in their library. Unfortunately the museum itself is only in Japanese, and due to size constraints it seems unlikely that much effort will be made to incorporate information in English. But there are a few videos in English that may be helpful in familiarizing you with the issue.
Source:
1. Norhteast Asian History Foundaiton, The truth of Japanese military "Comfort Women" 2007