Forum:Chakra chains

Based on the recent few chapters showing chakra chains being used to subjugate tailed beasts both in the real world and as a seal, and the fact that the jutsu was first seen used by an Uzumaki clan member (Tobi has a sharingan, knows an Uzumaki, and has encountered Kushina before) Shouldn't it be classified as a fuinjutsu? While it doesn't take the form of most other sealing ninjutsu, its primary purpose and use is the same, which is to bind, restrict, and/or seal away an opponent. And the fact that the Uzumaki are known for their strange and unusual sealing techniques, combined with the fact that the chains were used for the nine-tails, and at the moment 6 of the tailed beasts seals right now, and that Kushina was going to drag the nine-tails back into her using them, pretty much confirms that its a fuinjutsu.