I don't think its just laziness on their part. Halloween is relatively new to Japan. Their first Halloween thing was in 2000 when their Disney World set up a Halloween event.
I just don't think they grasp the concept of the holiday. I think they could really benefit from sending someone here to the US, to one of our better Halloween events.
For example Cedar Point has a really creepy Halloween event. If you are going to incorporate another cultures holiday you should do some extensive research first.
Halloween isn't about being cute, unless your 5 and your parents dressed you to be adorable. It should be scary.
The witches costume should have been tattered with claw like hands and an ugly witches face mask with the hat.