Mollie Ziegler of GetReligion wonders why Christians are cremating their dead in noticeable numbers all of a sudden, despite 2000 years of commitment to burial because of a doctrinal conviction about future resurrection. I do realize that it's possible to have a metaphysical conception of what persons are such that you think persons will survive the cremation process and be reconstituted in a resurrection. I think most people's views would actually allow that. But I very much doubt the 2000 years of tradition that Christians bury their dead is largely out of worrying that God couldn't resurrect you if you were cremated. It's more simply a symbolic demonstration of the faith that God would raise the dead in the end, indicating by your refusal to destroy the body that you believe this very body will one day be restored.
It's really unfortunate that Christians are rejecting this important symbol of a key Christian belief, one that long predates Christianity, going even back to the patriarchs of Genesis. This is somewhat like deciding we shouldn't waste water and therefore deciding to baptize people by lowering them below ground level in a hole and then pulling them back up. You can maintain the belief, but you lose a key piece of symbolism that's not some later tradition but is actually in the biblical texts.
One commenter in that thread complains that this point would seem to require Japanese people to break the law requiring cremation. I didn't see anyone arguing that Japanese Christians should break the law (though perhaps they should be arguing that it be changed to allow for exceptions for religious reasons). What people are arguing is that something is lost in the Christian witness, something that is symbolized by burial rather than cremation. We ought not to go along with social forces that move in that direction without serious consideration for what we're abandoning, which is a symbol present in the pages of scripture that illustrates a spiritual truth. Symbols in scripture that go back to the patriarchs should receive a strong presumption. That doesn't mean they override the law, since there is no direct command to bury your dead, but it does mean we shouldn't make our decision merely on considerations that are less serious than those involving how we represent the gospel in our lives and deaths.