Could be true- why not? I've also wondered about Hidan's "Lord Jashin" before. Altho, the world of Naruto and what happens to ppl when they die is still all pretty messed up. For example: The White Fang; Kakashi's dad had been sitting by a campfire till his son or somebody came along and told him that he was awesome and then he "passed on"

Also, the path of Pain that took ppl's souls- where the hell did that come from again??? Then you've got the Impure World Resurrection jutsu that's bringing ppl back from the afterlife where they were presumably happy being dead.
All of this bring me to the Dead Demon Reaper Death Seal...... Who the hell is that Reaper guy again? You trade your soul to seal another person in a never ending battle or something another? Maybe "Jashin" is that reaper guy with the sword in his mouth....which is a pretty crappy place to keep a sword if you ask me! Looks cool but not really all that practical. Cut your lips off or your head in half if you tried to weild one like that! haha[/QUOTE
I think the Reaper is just a chakra manifestation.
To the sword thing, not true. You should look up Roronoa Zoro.