Board Thread:Boruto Discussions/@comment-30881771-20180425153347/@comment-11891028-20180425212448

Lorenzo.r.2nd wrote: Elveonora wrote: Which means that Naruto too should indeed still have tiny fragments of the other 8 Tailed Beasts' chakras. 1) does urashiki say that there are only two jinchuriki in earth before or after bee is taken out? and 2) how do they know what a jinchuriki is? maybe kara is telling them shit? filling them in? it would explain how the otsutsuki team only found out about what happened on earth recently... Urashiki said there were only 2 Jinchuriki before the attack on Bee, and identified them as Naruto and Killer Bee.

The way I see it, Urashiki did some sort of reconnaissance to gain intel about Earth, most likely after defeating Toneri, and then relayed all the info on to Momoshiki and Kinshiki. He pretty much told them (in the episode) that the Ten Tails had been split into the tailed beasts and those who had a tailed beast sealed inside them were Jinchuriki. Though we don't really know (unless it's been revealed in the manga) how exactly Urashiki found out all this.