A little more passive aggressive and less openly hostile. More like, “you are not one of us, you will not be invited to ‘play our reindeer games’ and we will largely ignore your presence unless absolutely necessary”. Social circles are a ridiculously big thing there. The best description is to imagine middle aged adults acting like high school juniors in terms of cliquishness.
There is a certain level of childishness ingrained in Japanese culture. Its why a lot of people, especially young women get fed up with it.
