I visited Japan in the summer of 2001, and spent a day in Hiroshima.
There, I visited the "Hiroshima Peace Military Museum", situated at the south end of "Peace Memorial Park".
The main building of that museum is dedicated to the effects of the bombing on Hiroshima. The other, exhibits Japan's (and specifically the city of Hiroshima's) military history preceding the bombing, with a bit of a chronology of the city's history (pre-war), and a large central exhibit on the explosion itself.
Nestled among the chronology of Japan's military history, is a panel saying (this text is directly copied from the museum's official web-site virtual tour at:
http://www.pcf.city.hiroshima.jp/frame/Virtual_e/visit_e/est.html):
Early in the war with China, the Japanese Army occupied many Chinese cities. In December 1937, it took the capital city, then called Nanking. The occupation of this important city cheered the Japanese people, who considered the war in China a holy crusade. Hiroshima's residents celebrated with a lantern parade.
In Nanking, however, Chinese people were being massacred by the Japanese Army.
Reports of the number killed vary depending on the area and the time studied. Some estimates are in the tens of thousands, while others put the figure at well over 100,000. In China, the most common estimate is 300,000.
What I need to make more clear though, is that the last three sentences of that actual panel presented in the Museum (starting with "Reports"), were in parenthesis, in fine print, off to the side, at the bottom.
That was it. Miles of exhibits on Japan's glorious military history, all ending at the bomb and all printed in sixteen languages, for all of the millions visiting this city to see, and this footnote. Personally, it made me want to spit on the ground of that museum dedicated to "Peace".