What is that thing hanging on Naruto's shoulder?

Answer 1

They are actually not talked about however, i guess they are design features of naruto's clothes, also with the patter it resembles Rasengan.

Horizon XII: Naruto Uzumaki. Naruto is born with the surname Uzumaki, which means his ancestors were originally from the land of whirlpools. This symbol may be of his clan, like the uchihas have their lollipops.

Answer 2

If you mean that spiral with the box on each side, it's merely decoration, it serves no function.

Horizon XII: Naruto Uzumaki. Naruto is born with the surname Uzumaki, which means his ancestors were originally from the land of whirlpools. This symbol may be of his clan, like the uchihas have their lollipops.

Answer 3

I think. Your talking about the necklace tsunadae gave him when Naruto beat Kabuto. That necklace was meant to keep the nine tails (who's actual name is kurama) from advancing over three tails I think, if I'm wrong then it's most likely to prevent the nine tailed cloak from appearing.

Answer 4

the little swirling thing?that's his family's crest

Answer 5

it is the uzmaki Clan sign.Even though they are now wiped out they used to have good relations with konoha so they keep it on their uniforms as a sign of good faith.