Until the 1970s,Japanese war crimes were considered a fringe topic in the media.
In the Japanese media,the opinions of the political centre and left tend to dominate the editorials of newspapers,while the right tend to dominate magazines.
Debates regarding war crimes were confined largely to the editorials of tabloid magazines where calls for the overthrow of "Imperialist America" and revived veneration of the Emperor coexisted with pornography.
In 1972,to commemorate the normalization of relationship with China,Asahi Shimbun,a major liberal newspaper,ran a series on Japanese war crimes in China including the Nanking Massacre.
This opened the floodgates to debates which have continued ever since.
The 1990s are generally considered to be the period in which such issues become truly mainstream,and incidents such as the Nanking Massacre,Yasukuni Shine,comfort women,the accuracy of school history textbooks,and the validity of the Tokyo Trials were debated,As the