The Strongest Swordmaster in the World of Naruto

One day, after successfully perfecting the Rasengan, Minato approached Aoki with a gentle smile. "You've helped me a lot," Minato said with a bright smile. "As a token of my gratitude, I will grant you one request, whatever it may be."

This was a rare opportunity that Aoki did not want to waste. Without hesitation, Aoki immediately asked for something he had been thinking about for a long time—lessons in Fuinjutsu. Aoki knew how complex and powerful this sealing art was, and learning from an expert like Minato was a dream that rarely came true.

Minato, hearing the request, paused for a moment. Aoki's expression shifted from friendly to serious. "Fuinjutsu," Minato murmured with a serious expression. "It is a very complicated art, Aoki. To master it, you need very good Chakra control."

Aoki nodded, ready to accept the challenge, but then Minato continued with a slightly hesitant tone. "The problem is, you don't have much Chakra, and without enough Chakra, mastering Fuinjutsu will be very difficult. It could even be said to be impossible."

However, Aoki just smiled widely, a smile that was rarely seen. "Who says I need a lot of chakra, Minato-san?" Aoki replied cheerfully, his eyes shining with an unwavering spirit. "If chakra is not enough, I can use Natural Energy instead."

Minato was momentarily taken aback. Those words, though simple, opened up possibilities that Minato had never considered before. Natural Energy, which could only be controlled by those who understood how to absorb it from the surrounding world, could be the key for Aoki to surpass limits that he should not be able to reach. Minato looked deeper into Aoki, as if seeing something more than just an ordinary person. There was a power within Aoki, a power that had yet to be fully revealed.

Minato, hearing Aoki's statement, was astonished. His eyes widened, as if he couldn't believe what he had just heard. "You... can use Natural Energy?" Minato asked with a tone full of uncertainty.

Aoki nodded calmly. "Yes, I can now control Natural Energy quite well," Aoki replied, his tone showing a newfound confidence. Hearing this, Minato fell silent. His mind raced, considering all the possibilities and implications of that statement.

Minato had never heard anyone use Natural Energy as a substitute for chakra in Fuinjutsu. "All this time, Fuinjutsu has always used Chakra as its source of power," Minato murmured, half-talking to himself. "It never occurred to me that Natural Energy could be an alternative... But if you can truly control it..."

Minato then took a moment to reflect, his expression turning serious. What Aoki was offering was not a small matter. If it were true that Natural Energy could be used for Fuinjutsu, it could open new doors for the ninja world, allowing users with limited chakra to harness this incredibly powerful sealing art.

"Hmm... thinking about it, theoretically, it should be possible," Minato said with a thin smile.

"We have to try it," Minato finally said, his tone filled with tension and enthusiasm. They quickly headed to the training area, and Minato prepared a simple basic seal. "I want you to try to transfer this Natural Energy into the seal I drew here," Minato instructed.

Aoki closed his eyes, took a deep breath, and began to feel the flow of Natural Energy from his surroundings. Slowly, Aoki directed the Natural Energy into the seal that Minato had created. For a moment, nothing happened—and then, the seal began to glow with a soft light, more natural than usual.

Minato's eyes widened, his mouth slightly agape. "This... worked," Minato murmured, almost in disbelief. It felt as if Minato had just unlocked a secret that had been tightly sealed all along.

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