A Shaman from the Uzumaki Clan in the World of Naruto

If the same effects can be achieved with Ninjutsu, why bother creating new Fuinjutsu?

However, for Reiji, there was a deeper reason. Fuinjutsu reminded him of Shamanic Spells—a craft that Reiji had mastered well.

After spending a full week creating a new Fuinjutsu, Reiji did not stop there.

Reiji's spirit burned bright.

He continued his research, spending the following week creating another offensive Fuinjutsu.

This time, Reiji succeeded in creating a technique that allowed spikes to emerge from the ground, striking enemies with deadly precision.

Week after week passed, and Reiji dedicated himself to studying Fuinjutsu.

Every week, Reiji managed to create a new Fuinjutsu, without pause.

Reiji experimented with various media and effects, from elemental explosions to complex traps capable of holding enemies in place.

All of this was done with a single goal: to make Fuinjutsu a more versatile and lethal art.

...

In the end, more than three months had passed since Reiji first arrived in this world.

In that short time, Reiji had made many remarkable achievements.

He created a number of new Fuinjutsu, an accomplishment that even the most skilled sealing experts would find hard to match.

All the Fuinjutsu Reiji created were entrusted to Keito, someone Reiji trusted to spread the book without revealing Reiji's identity.

Not only that, but Reiji also compiled a Basic Guide to Fuinjutsu, a monumental work designed to make this sealing art easier to understand for anyone—both beginners and those looking to deepen their understanding.

The book quickly became popular.

Ninjas from various backgrounds began reading and studying it.

The book not only provided an introduction to what Fuinjutsu is, but also explained how it works, the process of creating it, and important tips for mastering it.

The simplicity and clarity of the explanations made it revolutionary in its field.

Keito, acting as an intermediary, remained silent about who the author of the book was.

Reiji's name was not mentioned, in accordance with his wishes.

Meanwhile, Reiji continued to focus on his experiments.

However, new obstacles began to arise.

One of the biggest hurdles Reiji faced was a lack of materials for experimentation.

Many believed that Fuinjutsu only required chakra and an understanding of theory.

In reality, it was much more complicated. Fuinjutsu often required specific media as a means to manifest its effects.

Reiji thought of real-life examples to explain this.

One of them was Minato's Hiraishin Kunai, which used Fuinjutsu in the kunai's handle to create a "technique formula."

By marking the kunai, Minato could teleport with incredible speed.

This example showed that Fuinjutsu often involved more than just chakra; physical media such as kunai, paper, or even earth played a crucial role in optimizing the technique.

Currently, Reiji continued to seek ways to overcome this obstacle.

From the understanding he had gained, Reiji realized that Fuinjutsu, although it could be performed with just Chakra Ink and Paper, required more specific media to produce maximum effects.

This was very different from Shamanic Spells, which utilized various materials such as Snake Teeth, Wolf Claws, and Eagle Eyes.

These materials could create tremendous power, such as a Giant Mouth made of dark purple mist, an attack that left victims coughing violently until they ultimately died.

However, Fuinjutsu, which was more often used for support types and some defensive types, rarely utilized media that required special materials.

Offensive Fuinjutsu, which was rarely found, did not even require other media due to its simpler nature.

Now, Reiji's progress in Fuinjutsu had hit a dead end.

There were no experimental materials to try.

------------------------------

[Announcement: A New Novel Has Been Added!

Marvel: The Sorcerer in America

Lance White is not an ordinary human. His body is a manifestation of the power of a Super Saiyan, while his soul is an unexpected combination of a Shinigami and a mutated Arrancar, granting him unparalleled spiritual strength. With Poseidon Scale Armor protecting Lance's body and The God Killer Sword and Trident of Neptune in his hands, Lance fulfills his destiny as a hunter of darkness.

In a world filled with heroes and supernatural threats, Lance hunts the most sinful villains on earth—creatures too evil to be forgiven—and navigates the realms of hell to defeat the unimaginable terrifying monsters.]

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