Board Thread:Theories and Speculation/@comment-3568954-20170629122631/@comment-734582-20170629200707

Nope2937 wrote: Anime-only feats don't count Even in the Manga-canon they came here somehow. The Boruto movie implies how: The Otsutsuki already had access to a Shinju and processed into the chakra pills. We don't know if Momoshiki's planet is the otsutsuki homeworld or not, but it seems pretty much confirmed to me that the Otsutsuki had their own, processed it and used it to travel the galaxy. Which is why Kaguya was forbidden from harvesting it, and why she feared others once she took it.

Thus yes, it's entirely possible that Kaguya already had access to chakra, simply not as innate power. But the Shiju is still the origin of all chakra, even if the Shinobi world's one wasn't the first to be the origin.

NOTE: the alternative to the Otsutsuki having their own Shinju is rockets, and i have yet to see an Otsutsuki spaceship.