What's the background music playing on Naruto Shippuden episode 329 when Naruto meets all other jinchuuriki? On Naruto Shippuden episode 329, there's a background music that was played when Naruto meets all jinchuuriki and they share their power with him.

The relevant scene on the YouTube starts at 1:30.
It's an unreleased OST of Naruto Shippuden called Decision (YouTube reference).