Minato

The concept of swordsmanship is a recurring theme in many fictional worlds, from ancient Chinese legends featuring flying sword immortals to modern anime like "Rurouni Kenshin" with its master swordsmen. Regardless of the setting, swordsmanship often carries an air of mystery, leaving some viewers scratching their heads.

In reality, swordsmanship, or kendo in Japanese, is a martial art that combines physical conditioning with techniques for focusing one's strength into a single, powerful strike.

Here's a simpler way to think about it: In fantastical worlds, at most, characters have powerful, energy-infused bodies that allow them to swing a sword faster and harder. At best, their internal energy might even attach to the blade for a flashy visual effect.

Of course, for an extra layer of coolness, you can throw in attacks like fire, ice, or wind blades.

The key concept of kendo (Kenjutsu), however, is maximizing your power by focusing it to a single point, allowing you to unleash 100%, maybe even 200% of your strength. This principle holds especially true for stronger characters.

Take the legendary battle between Uchiha Madara and Senju Hashirama from "Naruto." While their clash was visually spectacular, fueled by powerful chakra reserves, it wasn't exactly elegant. It was essentially a raw power struggle between two juiced-up chakra bodies, their flashy moves like "Susanoo" and "Thousand Hands" ultimately boiling down to a brawl.

While both Madara and Hashirama were undeniably strong, their fighting style left them vulnerable to weaker opponents who could exploit their reliance on brute force. But against an equally powerful foe, it often became a battle of attrition, a fight to the bitter end.

This is where characters like Aizen Sosuke from "Bleach" stand out. From his first appearance to the final showdown, Aizen remained focused on his goals. Fancy techniques and special abilities meant nothing to him. He consistently relied on skilled swordsmanship, often winning with a single, well-placed strike. His mastery of kendo combined with his immense spiritual power (Reiatsu) allowed him to wield his sword with unmatched precision and efficiency.

Even legendary figures like Uchiha Madara and Senju Hashirama, who ended the Warring States period, understood the importance of focusing their power. Kenjutsu, the art of swordsmanship, emphasizes this principle through three distinct realms: Sword Body, Sword Potential, and Sword Intent.

The first realm, Sword Body, focuses on combining physical strength, stamina, and various sword techniques. This is the most fundamental stage, and it also exhibits the most significant disparity in strength. A skilled Sword Body practitioner can condense their power to a focal point, ranging from 3% to 5%. Anything lower, like 1% or even 0.1%, is considered practically pointless.

Imagine if Senju Hashirama, upon mastering Sword Body, could condense the chakra used for one-tenth of his "True Several Thousand Hands" technique into a single, devastating attack. Uchiha Madara wouldn't stand a chance!

However, the higher realms of Kenjutsu - Sword Potential and Sword Intent - are beyond Aizen's current reach. These require immense dedication and surpass the scope of what he can achieve in his current situation.

"Kenjutsu is a demanding discipline that tests both talent and understanding," Aizen acknowledged. "Significant progress takes time and consistent practice, something I lack right now. However, there are techniques that can offer a temporary boost to my combat effectiveness."

Clearly, Aizen hasn't forgotten the trouble his predecessor caused him upon arriving in the past. After careful consideration, he reluctantly sheathed his sword.

It's important to note that unlike the real world, where swords and katanas have distinct names, the "Hokage world" primarily refers to blades as swords.

While Kenjutsu training can wait, Aizen prioritizes mastering a perception technique called "Reiryoku" from the Shinigami world. Since both his chakra and ninjutsu knowledge are still under development, honing his perception is crucial.

Initially, Aizen wasn't particularly interested in learning a perception technique. After all, his current strength and position in Konoha don't necessitate such a skill – yet. His true objective was "Shunpo," a high-speed movement technique. However, Shunpo demands exceptional physical conditioning and extensive training, making it unlikely to yield immediate results.

Even with the memories of his Shinigami counterpart, Aizen can only streamline his learning and shorten the training time, not become a master overnight.

In the deceitful and manipulative world of the Ninjas, especially a cunning place like Konoha, exceptional perception is crucial for Aizen to avoid being caught.

'You mentioned that Aizen is part of Konohagakure, a village where ninjas are comrades. So why the paranoia?' Apparently, Aizen feels the need to be on guard against his own people!

Here's the key: Reiryoku, a perception technique used by Shinigami in "Bleach" to sense souls and Hollows. This is the technique Aizen is attempting to utilize.

Reiryoku's range generally scales with the amount of chakra poured into it.

For the first time, Aizen closed his eyes, focusing the chakra on his brain and activating Reiryoku in a specific way. A faint, almost undetectable soul signature emanated from him.

Then, a discovery! A few hundred meters away, a bright blue soul signature lurked hidden within the grass.

"..." Aizen remained silent.

This confirmed his suspicions! You previously mentioned the need to be wary of Konoha's "comrades".

Aizen calmly reached into his ninja pouch and, with lightning speed, hurled three explosive kunai towards the hidden figure.

Boom!

The kunai tore through the air with a sharp cry, followed by a thunderous explosion that obliterated the grass.

However, Aizen's Reiryoku revealed that the soul signature hadn't vanished. It had retreated swiftly just before the kunai detonation, narrowly avoiding the attack.

Aizen narrowed his eyes, turning towards this hidden Konoha ninja.

To his surprise, it was a young boy, roughly Aizen's age, clad in a dark blue training uniform. He had blond hair, blue eyes, and a cheerful expression that reminded Aizen of a warm sun.