Hong Kong has cultural ties to Japan in terms of popularity of Japanese food and entertainment (anime is popular especially), but anti-Japanese sentiment exists too, not to the same extent as there appears to me to be on the mainland.
I'd like to point out that, even beyond China and it's Special Administrative Regions, few people are happy that the Japanese "liberated" them from their colonial masters. When we are taught bits and pieces of Singapore history in primary school, the main focus is on the amount of suffering the civilian population went through during the Japanese Occupation. In addition, many of the senior citizens here still dislike the Japanese for what they did during the war.
Most of the younger generation (me included) are fence-sitters who, despite being taught the above and reading up on our own history (which frequently highlights this), still bear no animosity for Japan and its people. I guess it does make a difference between reading it up in a book and experiencing it first-hand.