Chapter 181: Jiraiya's Decision
"Rin, you performed that surgery very well. I heard about it. Even under the intense environment of the battlefield, you were still able to execute the eye-transplant surgery so brilliantly. You have a very good grasp of basic medical ninjutsu and certain surgical procedures. After a little more time, you will be completely ready to take the medical Jonin exam."
Yakushi Nonō spoke to Rin Nohara after carefully inspecting Kakashi's Sharingan. Kakashi's eye transplant was already the best-case scenario achieved so far. Even if she had presided over the surgery herself, the result would have been no different from Rin Nohara's.
"The Sharingan cannot be deactivated. The problem does not lie with Kakashi. The Sharingan of the Uchiha Clan occurs when a special kind of chakra appears in the brain during extreme emotional agitation, and this chakra alters the optic nerve, ultimately transforming the eye into a Sharingan. Therefore, the foundation of the Sharingan is that special chakra, not the eye itself."
This was what Yakushi Nonō had seen in the notes brought back by Tsunade. For this student who was constantly helping her handle matters, Tsunade could only pull out some medical research notes from home and give them to Yakushi Nonō as a reward.
Among them were the Second's notes on human experimentation, which contained quite a bit of research regarding the Sharingan. The true master of human experimentation within Konoha was none other than Tobirama Senju; even Tsunade had not experimented on as many human bodies as Tobirama Senju had.
Upon hearing this knowledge, Rin Nohara immediately understood where the problem lay: "So... the reason Kakashi cannot control the Sharingan is because he lacks this special chakra?"
"Mm. Although the eyeball is the primary target for modification by this special chakra, the brain,