We wanna give him his last rites, wash away his attachments, and send his soul to Higan safe and sound.

But a pyre's too smelly, and the smoke would draw attention and stuff.

If we buried him, some animals or stray youkai would probably dig him up and reveal the whole thing.

Are you sure this is about last rites and not, say... destruction of evidence?

Hey, don't be a party pooper.