Despite how painful it might be for the government, how about the whole truth? Everything from the reasons why to what they did. It is the only way for the Japanese population to realise what they Grandfathers did and maybe for them to understand why so many ex-servicemen from allied ppowers don't like them. If they are kept in the dark by their own education system, you can see why they don't really understand why China and Korea have this attitude of distrust towards them. Unfortunalty the change has to come from the government. Until it dose the people will remain in the dark except those who look in foreign text books on WWII.