"Hmm? Can the Mangekyō Sharingan be awakened without personally witnessing Uchiha Shisui's death?"
Hyuga Sho had completed another experiment.
That's right.
The reason he had stopped Uchiha Itachi from personally witnessing Uchiha Shisui's suicide...
On one hand, Hyuga Sho wanted to retrieve Uchiha Shisui's Kotoamatsukami.
On the other hand...
Uchiha Fugaku had said that during the Third Shinobi World War, a close friend had died because of him. Witnessing that scene had allowed him to awaken the Mangekyō Sharingan.
Hyuga Sho had changed one variable.
Uchiha Itachi was the Tool Person and test subject.
Now it seemed that...
"Emotional stimulation" was the root cause of awakening the Mangekyō Sharingan.
It had nothing to do with whether one witnessed death.
Hyuga Sho gave Uchiha Itachi a glance.
After awakening the Mangekyō Sharingan, Uchiha Itachi's Eye Power had increased rapidly.
Among the Uchiha Clan...
Uchiha Itachi's Chakra Amount... was at the very bottom.
Every technique had weaknesses.
Every person had weaknesses too.
Although Uchiha Itachi was known as a genius...
His weakness was his scarce Chakra Amount, which made it impossible for him to carry out carpet-bombing attacks.
Every use of a Ninjutsu had to be carefully calculated.
This also meant that Uchiha Itachi could not maintain an intense battle for a long time.
And the awakening of the Mangekyō Sharingan...
Made up for this shortcoming.
A large amount of Eye Power also meant a large amount of Chakra.
So...
Uchiha Itachi's total Chakra Amount = his own scarce Chakra + the large amount of Eye Power from the Mangekyō Sharingan.
However...
Using the Mangekyō Sharingan came with a burden.
Previously, Uchiha Shisui had been in pain all over and unable to maintain Susanoo, allowing Danzo to successfully ambush him. That was proof.
This power came with risks.
Any mistake in battle