For followers of Shintô, the equivalent of Hallowe'en (Obon) comes in the summer, not the fall.
It should be noted that Kantai collection celebrates Halloween directly, given Asashio. I imagine they just celebrate both.
Tw-!Kaga-oneechan, Twick or Tweat!!Eat that, be a good girl, and be quiet.Okaaay!swipmwfgh!omnomnomI'm getting it ready right now.swipTwick or Tweaaat!