Just one chapter today
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Since Hikifune Kiryu didn't react quickly, it shows that she is an old-school Shinigami. When faced with problems, the solutions she considers are often based on traditional methods, and she isn't particularly adept at utilizing external tools.
Even though she is the captain of the 12th Division, her tenure saw very few new tools being introduced in the Gotei 13.
While the 12th Division conducted numerous experiments, the result of this was that after Urahara Kisuke succeeded Hikifune Kiryu as the new captain, the first thing he did was to fully promote the reform of the 12th Division. He reorganized the Seireitei Research Institute into the Technology Development Bureau, shifting the focus from purely research to technology development, thus establishing a new mission for the division.
Since then, Soul Society's technology has advanced rapidly.
Arima also helped Hikifune Kiryu significantly in the Technology Development Bureau. While it is possible to use the aid of tools, manufacturing them is a difficult task.
During his leisure time, he visited Seireitei's residential area to look at houses. The person showing him around was the housekeeper of the Shihouin family.
For ordinary people, owning property and purchasing a house in Seireitei is difficult. After all, Seireitei is primarily inhabited by nobles. While there are many commoners living in Seireitei now, they are either descendants of nobles or Shinigami. This is the reason they can reside there.
However, such problems were never an issue for Arima. Even without the Shihouin family's help, as Arima, buying a house in Seireitei would have been easy, though he may not have been able to choose a good location.
Recently, he had been teaching Yoruichi, so he used the advantage of the Shihouin family, which would not go to waste.
The Shihouin family, which controls many small and medium-sized nobles, had long-standing relationships with those who joined the criminal army in the past. Even if family members perished in battle, they still served the Shihouin family. As time passed, many of these families left behind properties, and the Shihouin family took responsibility for managing these estates.
Thus, the Shihouin family had acquired a significant number of mansions.
After looking at several homes, Arima finally chose one at the edge of the aristocratic district. This house wasn't large, but it had many ancient trees, including persimmon and jujube trees, ensuring an abundance of fruits. The courtyard was peaceful and secluded, a great benefit for Arima.
Once the house was chosen, the Shihouin family sent someone to take care of it, primarily for cleaning purposes. As for the money, the Shihouin family didn't mention it, and Arima, of course, didn't give them any. After all, just the technique he taught Yoruichi—Shunko—was worth its weight in gold. Even if Yoruichi eventually learns to create Shunko on her own, Arima had helped her avoid many detours.
Moving to a new home is always a joyous occasion. However, Arima did not invite too many people to celebrate. Instead, he quietly opened another spiritual space underground in his new home and moved the items from the Vice Admiral Spiritual Arts Academy there.
At the same time, the experiments in the Hollow world continued.
As for Quincy research, there wasn't much left to explore. After extensive research, Arima and Aizen discovered all the secrets of the Quincy, at least seventy-seven of them. Aizen had lost interest in further studying the Quincy.
Aizen was the kind of person who, when facing the unknown, would become extremely enthusiastic about exploring and uncovering the truth. But once the truth was revealed, it became boring to him.
Currently, Aizen was more intrigued by a theory that Arima had shared with him—the "temporary soul" theory, proposed by Hikifune Kiryu.
This theory was something Hikifune Kiryu had developed and refined over the years. After numerous experiments, it had been confirmed to be feasible.
Aizen wasn't interested in the completed experiments. Upon hearing this theory, he came up with a new idea of his own.
"Since souls can increase their strength and enhance their Reiatsu by injecting external spiritual power, what if we stacked the souls of multiple Shinigami together? Could the accumulation of quantity lead to a qualitative change, thus breaking the boundaries of Shinigami?"
Shinigami also have their limits.
While most Shinigami cannot feel these limits, Aizen was able to see them.
It was precisely because Aizen recognized these limits that he longed to break them. He also knew that Hikifune Kiryu's research had likely been focused on breaking these limits.
If the master is so powerful, why would he still research the Soul King and the Quincy? It's because, above Shinigami, there is a more powerful existence: the Spirit King.
Even a part of the Soul King's right arm holds the power to break through life and death, allowing an existence that should be dead to remain between life and death.
Every time Aizen recalled the scene he saw in the spiritual space created by his master, he felt an overwhelming sense of awe. The once-sacred and revered Spirit King still held incredible power in Aizen's mind, though he was no longer as untouchable and sacred as before. This was because Aizen had learned the truth about the Spirit King from his master.
If Aizen wanted to break the limits of Shinigami, studying the Soul King and exploring the Soul King's power was one direction to take. But Aizen did not place all his hopes on this path. He was someone with his own ideas.
After hearing the "temporary soul" theory from Arima and knowing that it was feasible, Aizen came up with his own approach. He intended to use the power of the Soul King to break Shinigami's boundaries, but this wasn't the path he wanted to take himself.
However, before going down his own path, Aizen informed Arima and sought his master's opinion.
"Sure enough, he's still here!"
Upon hearing Aizen's thoughts, Arima couldn't help but sigh inwardly.
Before Urahara Kisuke created the Hōgyoku, Aizen had already developed it.
Urahara Kisuke's Hōgyoku was created from the souls of multiple Hollows, while Aizen's version was the opposite, created from the souls of many Shinigami and Rukongai inhabitants who had the potential to become elite Shinigami.
Both Hōgyoku were incomplete because they only possessed one type of power. Only by combining the souls of Shinigami and Hollows—representing two different directions of soul evolution—could the most perfect suppression be achieved.
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