Board Thread:Theories and Speculation/@comment-32457608-20170823143115/@comment-32457608-20170825172452

Ravenlot 27 wrote: Hashi wasn't renowned for chakra control. Again, it was the innate Regeneration Ability of his cells which made him famous for healing wounds without weaving any hand signs. Also, his forehead markings are the result of Sage Mode, a completely separate ability, so I can't get a thing why you try so hard these completely unrelated factors together.

Thats the reason I said chakra control aint the only factor. And the marking might be sage mode but it looks hella similar to be a coincidence. Jiraiya did a marking to summon two frogs in his shoulders and the seal uses lifeforce of user so there is a connection between those. The seal does the same thing. This is a seal as it collected her chakra for 3 years according to shizune. It aint medical ninjutsu.