Maciamo, first I want to say one thing before I respond. That everything below is directed at what you wrote, not at you personally.
I'm a person who goes by gut feeling on right and wrong. I may not be able to "explain" why something is wrong or right at the given moment, but somewhere deep down I know it IS. Call me arrogant, self-rightous, it doesn't matter, it is just the way I am. When I read this, I got that gut feeling very strongly. However, I am unsure of the specific reason why. Something, is wrong. Either what you wrote is due to your exposure to certain types of people and having a skewed view, or the fact that what you saw IS true and that it is extremely sad to read that it is. I knew one person from Japan, and care deeply about them. I can clearly say that I know they do not agree with some of the views you have stated that are common in Japan. By that, I know what you are saying cannot at all be 100% true.
At this moment, I cannot believe that all this is simply the way it is, no matter what. Even due to my total lack of experience, and the fact I have never been in Japan. I consider the majority of society to be mostly idiots, and count this for the world population. There are however, some truly good people out there. If you judge the people of a country on the "majority" of the actions of their population I think you would come up with every single country being full of absolutely cruel, horrible people.
I guess that is my reply... Something is very wrong, but I am not sure just quite what.