Is Japan more favoured than China by westerners when talking about Asia?

I don’t know why. Lots of westerners want to visit Japan, and many dishes, handicrafts , cosmetics I see in London have Japanese elements. But does any one remember that Japan deny the nanjing Massacre? If Germany denys its war crimes we know what would happen but why westerners are so tolerant towards Japanese behavior during WWII, is it only because Japan didn’t invade western countries and kill westerners?