Anti-Japanese sentiment in Asia

OK so this one's a bit off-topic but I've become aware of a disturbing trend in Asia, particularly in China, most worryingly among the younger generation. It started when we (I was still travelling with Mr Reid at the time) met these teachers in Yangshuo (southern China)...one of them, had asked his students which country they wanted to visit and why...the usual platitudes followed until one girl stood up and announced, "I want to go to Japan so I can kill them"...I can't remember how the discussion continued from there. Later a girl I met in Le Pub in Saigon told me of a friend of hers whose class was interrupted by a kid standing up and exclaiming, "teacher, teacher, the Japanese are dogs"; a comment which apparently received unanimous applause from the class. Finally, a Japanese girl who went to school in Korea told me a kid used his intro (tell me about yourself) speech to denounce Japanese sovereignty over some disputed islands, pointed at the girl and exclaimed, "those are OUR islands". Having toured the Changi Museum in Singapore (as well as the HK History Museum) I'm fully aware of the horrors committed by the Japanese and I think there is some truth in the POV that these often receive less historical and political , say, the Holocaust. But that such hatred seems to still exist within the younger generation is, to my mind, very worrying.