Temporarily putting aside the matter of possible enemies behind Uchiha Setsuna, the two began discussing recent battles.
Fumori Masaki had called Uchiha Kagami over for two reasons: first, to increase their forces in the Land of Grass, and second, because he needed Uchiha Kagami's power—more precisely, his Mangekyo Sharingan.
"Besides Onoki, there are two other troublesome individuals in Iwagakure right now: the Jinchuriki of Iwagakure," Fumori Masaki said, handing a piece of intelligence to Uchiha Kagami.
Uchiha Kagami quickly scanned it. The Jinchuriki of Iwagakure were named Roshi and Han, both young men in their twenties. They could both use the power of their Tailed Beasts simply and were capable of using Kekkei Genkai-level secret techniques.
Although it might be similar to Bunpuku, where their close relationship with the Tailed Beast allowed them to use secret techniques, given their abilities, it was also possible they had mastered these Kekkei Genkai secret techniques themselves, much like Gaara in the original timeline who didn't lose his ability to control sand after losing Shukaku.
Roshi's Kekkei Genkai was called Lava Release, which, as the name suggests, was a ninjutsu combining fire and earth attributes.
Uchiha Kagami had witnessed Hiruzen Sarutobi's composite ninjutsu of fire and earth, and Lava Release was basically similar, except that as a Kekkei Genkai, it was on a higher level than a simple superposition of two ninjutsu.
Han, on the other hand, used Boil Release, a combination of fire and water release.
Han's Boil Release focused on the high temperature and power of steam, differing somewhat from the acidic corrosion-focused Boil Release of the future Fifth Mizukage, Mei Terumi.
Even with the same Kekkei Genkai, the effects manifested can differ due to each individual's unique understanding, which is also why Kekkei Genkai are difficult to learn and largely rely on bloodline inheritance.
Aside from Onoki, who could use Dust Release, these two Kekkei Genkai users who were also Jinchuriki posed a significant threat.
Konoha's explosive tags and other measures could effectively prevent traditional Earth Release ninjutsu, but due to Iwagakure's utilization of Earth Release, battles often devolved into stalemates.
If Konoha's ninja were to slightly relax and allow the explosive tag positions to be dismantled, it would turn into close-quarters combat between squads and teams.
In such situations, the powerful individual combat abilities of Roshi and Han would naturally have a great impact, sometimes deciding the outcome of a battle.
Of course, Konoha's ninja were no pushovers, so the two sides largely remained evenly matched.
"Now that Sunagakure has surrendered, that old fox Onoki must also be considering how to withdraw from the war.
Before he voluntarily states his intention to leave, we must deal him as much damage as possible.
I believe eliminating the Jinchuriki is the best approach.
However, my intention is not to eliminate them, but to capture them.
For this purpose, we will need to use the genjutsu of the Mangekyo Sharingan," Fumori Masaki said.
Any Jinchuriki who can properly use their power is a monster among ordinary people, even imperfect Jinchuriki.
And while Jinchuriki are powerful, they have a weakness: their power is, to some extent, linked to the Tailed Beast.
Therefore, methods that restrain Tailed Beasts are the best means to control Jinchuriki.
At the highest level, that would naturally be the Gedo Mazo's chains and black receivers from the Rinnegan system.
Without the Rinnegan currently available, the next best options are Wood Release secret techniques and Sharingan genjutsu.
Hashirama, who could use Wood Release, has not yet grown, so the only usable option is Sharingan genjutsu.
Back then, Uchiha Madara used his Mangekyo Sharingan to control the Nine-Tails, bringing it to a death match against Hashirama Senju.
In later generations, Obito Uchiha also controlled the Nine-Tails and fought against the Fourth Mizukage and the Three-Tails.
Uchiha Kagami's Sharingan type leans towards genjutsu, and his abilities might even surpass those of non-genjutsu type users like Obito Uchiha.
Uchiha Kagami nodded slightly.
The effectiveness of Sharingan genjutsu in suppressing Tailed Beasts had already been proven during Uchiha Madara's era.
He had no doubt that his own Sharingan could also suppress Jinchuriki.
To the owner of a Mangekyo Sharingan, Jinchuriki, who were powerful to ordinary people, were not so formidable.
Of course, if it were a perfect Jinchuriki, even with genjutsu, the Jinchuriki and Tailed Beast could stimulate each other to break free from the genjutsu.
To control such a Jinchuriki, one would have to do as Obito Uchiha did, controlling both the Jinchuriki and the Tailed Beast with genjutsu.
Although he didn't know how Obito Uchiha achieved such a feat, Roshi and Han were not as troublesome as the Fourth Mizukage, who was a perfect Jinchuriki.
"Do we only need to capture them? Is there nothing else to do?" Uchiha Kagami asked.
"No need.
Whether it's stealing the Tailed Beasts or killing the Jinchuriki, both would offend Iwagakure.
In the future, both sides will need to cooperate within the framework of the Shinobi Alliance, so we should leave some room for maneuver if possible," Fumori Masaki shook his head.
With his experience from his previous life, Fumori Masaki understood the backlash that overly oppressed nations could have.
He couldn't deny that the last great war in his previous life was partly due to the harsh treaties imposed by the great powers after the previous war, which accumulated widespread dissatisfaction and a desire for revenge among the populace, leading to an unprecedented catastrophe in human history.
"Moreover, Jinchuriki are pitiable individuals, so we should show them some kindness.
Becoming a Jinchuriki is already a tragic fate, and then to be treated in various ways by people from other countries..." Fumori Masaki smiled and said, "They might be useful in the future.
Jinchuriki are weapons treated coldly by their villages, but it must be said that Jinchuriki also hold a sufficiently powerful status."
Uchiha Kagami understood that after Kushina became the new Jinchuriki, her superficial status didn't increase, but her actual influence was far greater than her official position.
Even the higher-ups had to consider her opinions to a certain extent.
If Kushina explicitly supported someone to become Hokage, that person would have a very high chance of becoming Hokage.
This was essentially because, in order to control the Jinchuriki, the village's higher-ups needed to maintain a certain level of close relationship with them.
This is also why most Jinchuriki in later generations were related to the Kage; for example, Killer B was the Fourth Raikage's adopted brother, Gaara was the Fourth Kazekage's son, and the Fourth Mizukage was even a Jinchuriki himself.
"At the same time, I also wish to meet the Tailed Beasts.
Most ordinary spiritual secret techniques can hardly connect with Tailed Beasts.
I estimate that only the Mangekyo Sharingan can help other people's spirits enter the Jinchuriki's mental world," Fumori Masaki said.
"What do you intend to do?" Uchiha Kagami asked, somewhat surprised.
"I want to consult them about natural energy.
The Tailed Beasts' chakra is deeply related to natural energy.
My Sage Mode has almost reached a bottleneck, and I want to see if I can gain some experience from other Tailed Beasts, which should also help with my future research on the Dragon Veins," Fumori Masaki said.