Wherever you believe you're supposed to go.
In my opinion, human belief shapes everything. If you're Christian and you believe you've lived a good life (and your God agrees with you), you go to Heaven. Likewise, if you've believed yourself to be an irredeemable sinner, you'll suffer in Hell, regardless of how your God thinks of you. It's easy to think of yourself as a good person, so your God has to confirm this before you're rewarded. However, it isn't easy to honestly believe you deserve to suffer after you die, so your God won't oppose this (except in some very specific situations).
The same applies to every religion. If you're Shinto and believe to have followed the ways of your spirit pantheon (be it a nature spirit, an ancestor spirit, or "demon"), then you join said pantheon in whatever realm it is a part of... except, of course, you wish to be rewarded for a life of sin, whereas you'll get only suffering. (Confusing? Blame it on LSD!
Maybe I'm wrong. Maybe I'll rot in the ground when I die. In the end, as long as the Cycle is preserved and I get my due reward/punishment, I have nothing to complain about, even if it's banishment to a sort of Oblivion.