I did not forget the others. DisneySea is the best example of the Disney imagineers taking their creativity, attention to detail, storytelling and design capabilities to the highest level. It all began with DL (the only park built under Walt's careful direction). The skills have gotten better and the Disney Sea project had adequate financial resources.
Disney does not have an ownership interest in the Japan parks; only a licensing agreement. Disney has a minority ownership interest in the Hong Kong and Paris parks. DL and WDW are the only wholly owned Disney parks.