From what I remember reading about, the Japanese government likes to downplay what really happened during WWII, to the point that they omit certain parts from Japanese textbooks (in the context of the Japanese system) in junior high and high school (one of them omitting atrocities of comfort women in Nanking) if not outright omitting it, there were only a few lines of what really happened during that time period that basically summed it up like, Japan went to war in WWII with allies Germany and Italy, we lost.

However, when it comes to talking about Nagasaki and Hiroshima (which both are very horrible events) pages could be written about it in textbooks.

Sure, I might be a Japanophile like the next person, but it still doesn't excuse some of these things.