[alanX]

While I was in Tokyo Disney land last week they had the whole thing decorated spooky Halloween style. I don't know if that's your thing or not but that's all I can come up with. We got our tickets from this red ATM looking thing in a 7/11 and it was only about 10,100 yen for 2 tickets, if I remember correctly.
I'm sure they'll have even more stuff on Halloween day, though. Maybe some parades or something.