Chapter no.25 Naruto

Chapter no.25 Konoha’s Barrier Corps HQ.

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The early morning chill bit through Sakura's clothes as she stood in the middle of nowhere. Endless fields of grass stretched around her, disappearing into the thick line of forest in the distance. Everything looked washed out in the pale blue light of dawn, the sun barely a suggestion on the horizon. Five a.m. Really?

She pulled her arms around herself, yawning as she glanced around. Why was she even here? Simple: Kakashi-sensei told her to be, after she'd asked him how she could learn barrier ninjutsu. Sure, it was kind of a random question, but she figured it couldn't hurt. Now she was thinking he was just messing with her. Kakashi-sensei, early? Yeah, right.

"Maybe I can just… lie down for a few minutes…" she mumbled, searching for the closest patch of soft-looking grass.

"Oh, is my cute little genin tired?"

Sakura practically jumped out of her skin. "K-Kakashi-sensei!" she managed, rubbing her eyes in disbelief.

"Yes?" he replied, looking far too alert for this ungodly hour.

"Y-You're… early?" Her mind was still processing. Why was he early, today of all days?

Kakashi just shrugged. "Well, today I didn't get lost on the road of life," he said, as if that explained anything, looking pleased with himself.

The road of life, she thought, deadpan, just staring at him. She was too tired to even react. Inner Sakura wanted to shout, Stop being so smug! But even Inner Sakura was tired, so all she could do was give him a blank look as he reached over and ruffled her hair. Normally, that would irritate her, but she hadn't exactly put any effort into it this morning. She barely had the energy to care.

"Alright, so… when do we start this training?"

"Oh, well, then let's get going. Can't keep your barrier ninjutsu teacher waiting."

Then, without missing a beat, he started weaving through an endless stream of hand signs. His fingers moved so quickly they blurred together, each sign flowing into the next with precise speed.

In an instant, a massive patch of grass ahead of them shimmered, then vanished, as if it had only been an illusion. What lay beneath was a hidden stone stairwell, descending sharply downwards. The sight snapped her fully awake, her mind racing.

"Ready to head into Konoha's Barrier Corps HQ?"

The stairway wound downward, the world above disappearing as the walls rose up, closing them into the earth. Step by step, a strange energy seemed to thicken the air around her. With each step, the weight of the place seemed to sink into her bones.

As they reached the bottom of the stairwell, she stepped into an enormous underground cavern. She barely registered the ceiling above; the space was so expansive, it felt like she'd walked into a stadium. The floor itself was covered by a sealing matrix that stretched endlessly, its intricate lines and symbols written in ink on this giant canvas, forming patterns that coiled and branched across the entire floor. It looked like something that took years—maybe even generations—to create.

In the center of the matrix was a large, clear crystal orb, nearly as tall as she was. Inside, hundreds of red dots moved, clustered and spread out. Some dots moved quickly, crossing paths with others, while some held still. A few seemed to interact, flaring briefly before separating again. The orb pulsed faintly, reacting to whatever the dots were doing, creating a sense of something alive within it.

The layout of the space became clearer as she took a few more steps in. High above the sealing matrix, metal bridges crisscrossed the cavern, connecting from one side to the other, suspended by thick chains bolted into the cavern walls. These bridges led to rooms and buildings built into the sides of the walls, their stone facades blending into the cavern's structure. People moved across these bridges, their footsteps echoing faintly in the vast space.

Below, there were more people scattered across the sealing matrix. Some sat cross-legged in deep meditation, hands placed gently on the lines of the seal. Others spoke in hushed voices, discussing the orb's red dots or jotting down notes on small scrolls. They seemed completely immersed, each person in sync with the energy around them. She couldn't even begin to count how many people filled this place, each focused, each connected to the matrix in some way.

"So," Kakashi said, "pretty impressive, isn't it?"

"Sensei… what is all this?"

"This, Sakura, is Konoha's Barrier Corps HQ. Not many people get to see it, and for good reason. This is the core of the village's security network. Every time someone enters or exits Konoha, that matrix picks it up."

"Wait… so, the red dots in that crystal orb… are those people?"

"Got it in one," Kakashi replied, sounding impressed. "Those dots are chakra signatures. Every person in the village has one, kind of like a fingerprint. The barrier records them all—the villagers, the shinobi, even visitors. Each dot shows a unique signature, so the Corps can keep track of who's where, all the time."

Sakura watched the dots move, some clustering, some drifting apart. "So it's… like a huge surveillance system?"

"Sort of," Kakashi said. "But it's a bit more sensitive than that. This matrix doesn't just track movement—it senses chakra fluctuations too. Let's say someone's chakra spikes suddenly, like if they're fighting or using a lot of jutsu. That would show up as a disturbance."

"Wait, so if I were to, I don't know, throw a big jutsu or something, they'd see it here?"

Kakashi chuckled. "Only if it was strong enough to matter. They're mostly looking for serious spikes—big jutsu, sudden surges, things that could signal trouble. It's how they tell the difference between an academy student practicing fireballs and an actual threat."

Sakura glanced around at the shinobi meditating on the sealing array and taking notes by the crystal. "And… what are all these people doing?"

"Good question," Kakashi said. "You see those people meditating on the matrix? Those are sensory ninjas. They're syncing their chakra with the barrier, so they can feel every signature coming in and out of the village. It's not just looking at dots—they're actually feeling the chakra, like an extension of their own senses."

"So they can just… sense if someone dangerous comes through?"

"Yep. They're trained to pick up on hostile or unfamiliar chakra, even if it's masked. If something doesn't feel right, they report it immediately. The ones up top, taking notes? They're the analysts. They track and record everything—patterns, anomalies, anything strange that might need a closer look."

Sakura's eyes widened. "So… this place is like Konoha's immune system."

Kakashi gave a nod.

"But… there's so many people here. Just for this?"

"Yeah. And none of them get any recognition. No missions, no glory, but without them, Konoha would be a lot more vulnerable. They're the silent guards of the village, working in the background to keep things safe."

Sakura looked at him. "I didn't realize you cared so much about this kind of stuff, Sensei."

"Well, don't let it get around. I have a reputation to uphold." He paused, glancing back at the vast sealing array with respect. "But the truth is, the village can't survive on just a few strong fighters. We need people like this. People who pay attention to the little things, who work in the shadows. It's the only reason the rest of us get to be out there, fighting."

"I… didn't know there was this whole other side to protecting the village."

Kakashi shrugged, his tone casual again. "Most people don't. And that's kind of the point. If this place does its job right, no one has to know it's here. The only ones who notice it are the ones who need to be noticed."

He tilted his head, watching her reaction. "Still want to learn barrier ninjutsu?"

"More than ever."

"Good answer," came another voice, smooth and lazy, as Sakura looked over to see two men approaching them.

The first man had brown, shoulder-length hair that hung loosely around his face, with a single senbon needle clamped casually between his teeth. His forehead protector was tied like a bandanna, and he wore the standard jōnin attire with a certain relaxed confidence. He looked at Sakura with a faint smirk, as if he already knew everything there was to know about her.

Beside him stood another jōnin with a distinctive feature: a scar like a jagged welt ran across the bridge of his nose and down one side of his face. His brown spiky hair and dark eyes gave him a serious, almost brooding look. Unlike his companion, he didn't seem inclined to smile. Instead, he examined Sakura with a calm, assessing gaze. His hands were wrapped in black bandages, and she noticed the faint glint of metal rings on a few of his fingers.

"Genma. Raido," Kakashi greeted them with a nod. "I see you two managed to tear yourselves away from lounging around the mess hall."

Genma gave a lazy shrug, the senbon in his mouth shifting from one side to the other. "We heard there was a new recruit," he said, glancing at Sakura with a glint of curiosity. "Didn't expect it to be one of your students, though, Kakashi."

"Ah, Sakura's a fast learner," Kakashi replied smoothly. "And I knew the Barrier Corps could use some fresh talent. Figured she could handle you two without too much trouble."

Raido raised an eyebrow, his scar stretching slightly with the motion. "We're not here to scare her off," he said. "But she'll need to prove she's serious. Barrier work isn't for everyone."

"I'm ready for whatever you have planned."

Genma chuckled. "Confident. I like that." He turned to Kakashi with a sly grin. "Mind if I give her a little test? Just to see if she's got the control for this kind of work?"

"Be my guest. Though you might want to be careful—Sakura's full of surprises."

Genma's smirk widened, and he pulled the senbon from his mouth, twirling it between his fingers with practiced ease. "Alright, Sakura. Think you can balance this?" He held out the toothpick-sized needle, raising an eyebrow.

Sakura reached out, taking the senbon carefully. She felt the weight—light, almost insubstantial. But she knew what this was about. Chakra control. She glanced at Kakashi, who gave her an encouraging nod.

Taking a deep breath, she focused, channeling chakra into her fingertips, letting it flow evenly through the senbon. Slowly, she lifted her hand, balancing the needle upright on her index finger. It wobbled for a moment, and she adjusted her chakra flow, steadying it until the senbon was perfectly still.

Genma's smirk faded slightly, replaced by a look of genuine surprise. He leaned in, squinting at the needle as if he couldn't believe his eyes. "First try… huh."

"What's the matter, Genma? Didn't you need, what… a dozen tries before you managed that?"

Genma shot kakashi a look. "I could get it to balance. Just couldn't keep it steady for more than a few seconds."

Raido chuckled softly. "Looks like you've been shown up, Genma."

Genma grumbled. "Beginner's luck. Maybe she's just a natural."

"A natural? I thought that was you, Genma. Weren't you telling everyone how you'd mastered chakra control when you were, what, ten?"

Genma huffed, flicking the senbon back into his mouth. "Hey, it's not as easy as it looks. You'd know that if you actually practiced this stuff, Kakashi."

"Oh, but I do practice," Kakashi replied, deadpan. "I just happen to be better at it."

Sakura watched the exchange, a little surprised by Kakashi's uncharacteristic teasing. He almost seemed… protective. Her heart lifted a bit—Kakashi wasn't the type to go out of his way for just anyone. Sensei is awesome, Inner Sakura yelled proudly.

"Alright, alright. You've got talent, I'll give you that. But raw talent only gets you so far. You'll need to work your butt off if you want to make something of it." Genma glanced at Raido. "Think she can keep up?"

"She might. And the kid will have to, considering Kakashi pulled some strings to get her a teacher."

"You… really did that, Sensei?"

Kakashi gave her a lazy wave, brushing it off as if it was no big deal. "Well, my cute little genin wanted to dabble in barrier ninjutsu, so I thought, why not? I'm not much of a barrier expert myself, so I just… asked around."

Genma chuckled. "And you just happened to land on Iwashi? Really, Kakashi? Out of all the possible instructors, you picked him?"

"Did you lose a bet or something?"

Kakashi shrugged. "Iwashi's a good teacher."

Genma and Raido both raised their eyebrows in perfect synchronization, then looked at each other before turning back to Kakashi.

"In what world?"

Kakashi's eye crinkled. "In the world where I trust him to push Sakura to her limits. Isn't that what matters?"

Sakura took a deep breath, grounding herself, steadying her nerves. She reminded herself of Tenten's words about being a part of a bigger machine. Every cog has its role, she thought. This is how I contribute to Team 7.

Sakura followed Kakashi, Genma, and Raido across the metal bridge, expecting something grand or imposing. But when she looked around, her first thought was how… ordinary it seemed.

Honestly, it wasn't anything special. The place felt more like an office than the heart of Konoha's defenses. The walls were plain concrete, gray and utilitarian, with no decoration or personal touches.

Genma said, turning to Sakura. "Bet you five ryo he's standing there with a coffee and the morning paper, halfway through, like he always is."

"Now that's just a losing bet."

Sakura gave them a confused look, wondering if they were exaggerating. But as they stepped inside, there he was: a man in his late twenties, dark eyes focused on the newspaper in his hand, a coffee cup in the other. He had brown hair and a small goatee, and wore a simple grey uniform—identical to the others working in the Barrier Corps. He looked… ordinary. Incredibly ordinary. Like he could have been a clerk at a library, not a barrier specialist in Konoha's security network.

Genma leaned over to Sakura, whispering, "Now he's gonna head to the fridge, grab a slice of sourdough, eat about two-thirds, sip his coffee, finish the rest, then wash it down. Watch."

To Sakura's surprise, Iwashi did exactly that, moving with an almost mechanical precision. He finished his coffee, tossed the paper cup into the trash, then folded his newspaper with care, as if he were completing some kind of daily ritual.

"Now he's going to come over and introduce himself like he's never met a stranger in his life," Genma said, smirking.

Iwashi finally looked up, his expression calm and unreadable. He gave a small nod to each of them. "Kakashi. Genma. Raido." Then his gaze settled on Sakura, who straightened under his steady stare.

"Iwashi Tatami."

Sakura nodded back, trying to keep a straight face. "Sakura Haruno. It's… nice to meet you."

He looked at her for a moment longer, his eyes giving nothing away, then nodded. "Haruno. You're going to shadow me. My job is to introduce you to the fundamentals of barrier work. Your job is to pay attention, take notes, and stay out of the way."

Sakura's heart sank as she realized she didn't have a notebook. She hadn't even known she was supposed to bring one, and Iwashi's sharp gaze made her feel like this was already some kind of test she was failing. Just as she was about to panic, Kakashi stepped forward, holding out a small, leather-bound notebook.

"Here, Sakura... You'll need this."

Relieved, Sakura took it, but her relief quickly turned to embarrassment as she noticed the cover. It was covered in tiny, doodled chibi Sasukes, all in different dramatic poses, with little hearts floating around them. Her face went bright red as she looked up to see Kakashi, Genma, and Raido barely containing their laughter.

She shot Kakashi a look, her blush deepening. I'll get back at you for this, Sensei. Shanaro! Inner Sakura fumed.

"You are a grown man, Kakashi-sensei," she muttered, clutching the notebook to her chest.

Genma snorted, nearly doubling over with laughter. Raido was shaking with silent laughter, trying to keep a straight face but clearly failing. Kakashi just shrugged innocently.

"It's important to have a personal touch, Sakura."

Suddenly, Kakashi gave her a gentle nudge, inclining his head toward Iwashi, who was glancing down at his watch with an air of practiced patience, as if he lived every moment according to a strict schedule.

Sakura quickly straightened, the last of her embarrassment fading as she focused on Iwashi, who finally looked up, his expression calm and collected.

"Any questions you have, write them down in that notebook. You can ask them at lunch. I'll also be giving you daily tasks. Small assignments to practice what you learn here. You'll be judged on consistency and attention to detail. If you can't keep up…" He paused. "Then don't waste my time."

"Understood, Iwashi-sensei."

Iwashi's expression remained neutral. "Good. Then let's get started."

"Better not dawdle. He's not exactly the patient type."

She hurried after Iwashi, her notebook clutched tightly in her hands as they wove through the winding corridors of the facility. Iwashi moved with purpose, never glancing back to see if she was keeping up. He pointed out various rooms and sections as they passed, his explanations clipped and efficient.

Sakura had a hundred questions swirling in her mind, but she kept them to herself, jotting them down in her notebook as they continued through the Barrier Corps HQ. To her surprise, though, Iwashi led her out of the building entirely and toward Konoha's southern gate.

The southern wall loomed above them, stretching as far as she could see, crafted from dense, sturdy wood. This wasn't ordinary lumber—it was said to be grown by the First Hokage himself, Hashirama Senju, using his Wood Release. The wall extended all around the village, up to the base of the Hokage Mountain, where it anchored Konoha's outermost defenses.

Without a word, Iwashi began scaling the wall, his chakra perfectly controlled as he walked up the vertical surface as if it were second nature. Sakura followed quickly, focusing to keep her own chakra flow steady as they climbed.

Once they reached the top, Iwashi stopped and knelt down, pulling a small pot of ink and a fine calligraphy brush from his tool pouch. Without any wasted movement, he dipped the brush in ink and began renewing a long, intricate strip of sealing script that ran the length of the wall. His strokes were precise, each one flowing smoothly into the next, as he moved down the ten-meter section with practiced ease.

Sakura watched, mesmerized. There was a calm efficiency in the way he worked, almost meditative. His brush barely hesitated, gliding across the surface in a steady, fluid rhythm. She could feel the faint pulse of chakra weaving into the symbols as he painted.

Once the seal was restored, Iwashi moved through a series of hand signs. He clapped his hands together, then slowly pulled them apart, drawing out delicate blue threads of chakra. Sakura gasped as the threads wove together, twisting and interlocking like fibers forming a cloth. They shimmered in the morning sunlight, forming a complex lattice that hardened into a barrier. Iwashi placed it carefully above the seal he'd just painted, and the barrier settled with a soft glow, integrating seamlessly into the invisible dome surrounding Konoha.

"Wow…" Sakura whispered, staring as the barrier faded into transparency, becoming part of the larger protective field.

Iwashi didn't respond, already moving to the next section. For the next few hours, he repeated the process over and over—renewing the seals, weaving the barrier threads, then moving to the next stretch of wall. Sakura followed along, observing him in silence, marveling at his endurance and precision. He worked tirelessly, barely pausing to breathe, until at last he stopped for lunch, sitting down on the edge of the wall and pulling out a simple bento box.

Sakura hesitated before sitting beside him, her notebook in hand. She glanced at him nervously, not wanting to disturb his rest.

"Questions?" Iwashi said, without looking up.

"Well… aren't you tired, sensei? You've been working non-stop for hours. I mean… doesn't this drain a lot of chakra?"

"Irrelevant. Either ask your questions now or eat your lunch. I gave you the time; use it."

Sakura bit her tongue, feeling a bit stung. She'd only wanted to show some concern. Fine, Inner Sakura said. If he wants questions, I'll give him questions.

"Alright then," she said. "Why is it called 'barrier ninjutsu' when you're using so much… well, fuinjutsu?"

Iwashi nodded, as if he'd expected this question. "There are two types of barrier techniques: Offensive and Defensive. Offensive barriers are often pure ninjutsu—used in combat to trap or attack enemies, usually temporary and chakra-intensive. Defensive barriers, on the other hand, rely heavily on fuinjutsu and are designed to be stable, long-lasting. Because of that, barrier work is usually categorized under ninjutsu."

Sakura's brow furrowed. "So… what's the formal name?"

"Kekkai Jutsu," he replied, his tone patient but precise. "It's split into two main types, offensive and defensive. The distinction is largely for the archives. Out in the field, people just call it 'barrier ninjutsu.'"

She nodded, jotting that down, but another question popped up immediately. "Why do we use fuinjutsu for defensive barriers? Isn't fuinjutsu… complicated? I thought it was one of the hardest paths a shinobi could take."

Iwashi raised an eyebrow, his mouth twitching slightly at the corner, like he almost wanted to smile. "Two questions at once. But I'll allow it. First, we use fuinjutsu because, unlike pure ninjutsu, a properly crafted seal can maintain a barrier long after we've left. If I tried to sustain this barrier with my own chakra alone, I'd collapse in less than an hour. The seal sustains it for us. Think of it as anchoring the barrier to the wall, rather than to my own chakra reserves."

Sakura scribbled furiously. "So… how often do you have to renew them?"

"Every twelve hours," he replied. "There's an entire branch dedicated to maintaining and replacing these seals around the village. It's constant work. Like sweeping the floors—if you miss even one section, you create a weak spot."

Sakura absorbed this, thinking of the endless dedication it must take to keep the entire village's defenses in place. "And… what about the fuinjutsu?"

"Fuinjutsu is complicated if you're trying to create new seals. Crafting a seal from scratch—designing it, testing it, ensuring it functions without backfiring—that's an art. And yes, it's one of the hardest arts a shinobi can pursue. But here, we're not creating new fuinjutsu. We're following a blueprint. Every single seal I've painted today was designed by the Second Hokage himself. A masterpiece of efficiency."

He gestured to the faintly glowing strip he'd just completed. "All we do is replicate it. Copy and maintain. We're not trying to match the genius of Tobirama Senju. We're just preserving his work. So for defensive barriers, it's about precision and memorization, not innovation."

"So… I'm learning defensive barriers?"

Iwashi nodded.

"What if I wanted to learn offensive barriers?"

"Offensive barriers? That's a different story. Those are jutsu meant for the battlefield—traps, containment fields, techniques to lock down or even crush enemies. They're volatile, require immense chakra, and a much deeper understanding of elemental ninjutsu. To even begin learning them, you'd need to be at the level of a Tokubetsu Jōnin."

Sakura's eyes widened.

"Focus on the basics, on the defensive side, and perhaps… one day."

Sakura nodded, feeling both humbled and motivated.

"Honestly, I think I need to digest everything I've learned today. Maybe I'll ask more questions tomorrow. For now… what's my assignment?"

Iwashi gave a small, approving nod. "Good. Knowing when to absorb information is just as important as knowing when to seek it." He held up his hand, tapping his fingers thoughtfully. "Your first task is simple, but foundational. You need to learn how to create a single chakra thread."

Without responding directly, Iwashi brought his hand to his mouth, wetting his thumb and forefinger. Then he pressed his fingers together, drawing them apart slowly. A thin line of mucus stretched between them, glistening in the sunlight. He looked at her and gave a tiny smirk.

Sakura's lips pursed in disgust.

Iwashi chuckled, amused by her reaction. "Look closer, Haruno. Think of this like the structure of a chakra thread. Just like how the mucus is connecting my fingers, a chakra thread is formed by focusing and stretching your chakra into a thin, cohesive line. The key is in control—keeping it steady and connected, even as you move."

She looked at his fingers again, this time with more focus, trying to see past the unpleasantness. "So… tension?"

"Precisely. You're creating a link between two points and holding it together, just like this line of mucus. But with chakra, it's a lot harder. If your control slips, the thread will break or dissipate. You need to keep it focused and stable, but also flexible, so it doesn't snap. The thread should feel almost… sticky. Cohesive. Like it wants to cling to itself."

"So… that's how you do it."

Iwashi's eyebrow arched. "What do you mean?"

Without hesitation, Sakura pressed her palms together, focusing her chakra between them. She took a deep breath, then slowly pulled her hands apart. A single, faint blue thread of chakra stretched between her fingers, shimmering softly in the light.

Iwashi's eyes widened slightly, and he just stared, speechless for a moment.

"How…?"

"Well, I've been watching you all morning, trying to understand how you were creating those chakra threads for the barrier. I kept going over it in my head, breaking down each step. Your explanation with the… um… mucus analogy helped me see what I was missing. I wasn't applying enough tension, or keeping the flow steady."

Iwashi blinked, then let out a quiet chuckle. "You're a quick study, Haruno." His expression softened. "I wasn't expecting you to pick it up that fast. You have a bright future ahead of you."

"Thank you, sensei. I'll do my best not to disappoint you."

Iwashi nodded. "Nothing more I can ask. But since you've already completed the first assignment… let's move on to the next."

"I'm ready. What's next?"