Murakami's POV
The Senju compound was exactly what I expected from one of Konoha's founding clans. It was elegant, well maintained, and far larger than necessary.
I adjusted the sleeves of the black kimono I'd put on before leaving the store, keeping my expression calm and composed.
Beside me, Tsunade walked with the casual confidence of someone who had spent her entire life here.
She wasn't particularly excited about showing me around. At least, not anymore.
"That building is where Dad meets with the clan elders," she said, pointing toward a large wooden structure. "It's boring."
"Good to know."
"Don't go in there."
"I wasn't planning to."
She nodded, apparently satisfied, and continued walking.
A few moments later, she pointed toward another path. "Training grounds are that way. I usually go there when Grandma isn't watching."
I glanced at her.
"She knows."
Tsunade frowned. "No, she doesn't."
I said nothing.
Of course she knew. It was Mito Uzumaki. There was practically no chance Tsunade could sneak around this compound without her grandmother noticing.
Whether Mito actually cared enough to intervene was another matter.
But Tsunade didn't need to know that. I merely glanced toward her and continued walking.
We continued through the compound, Tsunade occasionally pointing out something whenever it caught her attention. The koi pond. The training grounds. A particular tree she liked climbing when she was younger.
This was what our relationship had become over the past month.
Not quite friendship in the way most people would define it. At least, I wouldn't have called it that.
She still annoyed me considering I still occasionally want to throw her out of my store whenever she comes around.
But she'd stopped treating me like some strange curiosity she needed to figure out, and I'd stopped treating every visit like an impending disaster.
Somewhere along the way, my presence had simply become normal to her.
And, annoyingly enough, hers had started becoming normal to me.
That realization alone was concerning in multiple ways.
We finally stepped into the main courtyard.
I was still listening to Tsunade complain about something involving one of her teammates when I felt it.
A faint sensory resonance brushed against my chakra.
My step slowed but I didn't stop walking as one thought took root.
Mito had sensed us.
There was no mistaking it. Her sensory perception had swept across the courtyard and passed over my chakra.
Most people probably wouldn't have noticed anything at all.
I did.
One of the perks of being a sensor, I suppose. Though in my case, my spiritual awareness made it even harder to miss.
The moment her sensory field brushed against my chakra, I recognized it for what it was.
I'd felt that same sensation countless times from the other side, when my own perception reached out and touched someone else's chakra.
Now, I was on the receiving end.
My expression remained neutral as Tsunade, completely unaware of what just happened, continued talking.
Then I felt it; a chakra presence so vast, dense, and deeply rooted. It carried a weight that made the surrounding air feel subtly different.
She sat beneath the shade of a cherry blossom tree, looking calm and strangely ageless.
Her red hair was neatly braided and coiled atop her head like a crown, and she wore a pale cream kimono embroidered with gold Uzumaki spirals so subtle they shimmered only when the light hit right.
Tsunade stepped forward with a grin. "Grandma!"
Mito looked up and gave her a mild nod, with a light tone, she asked. "Back so soon?"
"I brought Murakami," Tsunade said, pointing toward me. "He's working on some complicated sealing problem, and I figured if anyone could help him, it'd be you."
Mito's gaze shifted to me.
"Murakami," she said, "It's been a while since we last met. Welcome to our humble abode."
Humble my ass. I resisted the urge to roll my eyes, and bowed slightly. "It is a pleasure, Mito-sama."
"Oh, disperse with the formalities. I know for a fact that your words and actions aren't in sync with your emotions." She said with a giggle while bringing her hand up to cover her mouth.
I straightened slowly. "Then I'll take that as permission to be honest."
Not that I was surprised. If Naruto could do it in his youth, there's no doubt Mito could read chakra and emotions at a much higher level, pretending would only make me look foolish and disrespectful.
"Have a seat." She gestured toward the floor opposite her.
"Thank you." I said as I sat cross-legged across from her.
Mito nodded slightly. "So? A crazy seal?" She cast a glance at Tsunade before returning her attention to me. "I didn't know you were interested in Fūinjutsu."
"I am. I've been studying it for years."
Her eyes narrowed slightly. "You have an impressive sealing network arranged across your body," she said. "Is that what allowed you to achieve that feat?"
I didn't bother denying it. "Yes."
Her smile widened faintly, though her eyes continued scrutinizing me. "A seal that suppresses and refines both your chakra and physical body," she said thoughtfully. "Ingenious."
There it was. The exact reason I'd never wanted to meet someone like her.
How had she even discovered the Heavenly Restriction Seal? And I'd just had it upgraded! There shouldn't have been any external tell whatsoever, so how!
I didn't really know what emotion to feel at that moment. I felt like a kid who hides a object behind him confidently thinking you can't find it.
"I suppose there's nothing for me to say then," I admitted, it was ingenious no doubt. After a moment, I added. "Even so, I'd appreciate your discretion, Mito-sama."
"Fufufu. Who do you take me for? I'm an old woman well past my prime. What good would it do me to make an enemy of someone as enigmatic as you?"
Enemy? "You're overestimating me." I waved my hand. There's no way I wanted to be enemies with you.
Her smile disappeared. "I said enough with the modesty."
I paused. "There is a fine line between modesty and arrogance," she continued calmly. "Don't cross it."
"I understand." I nodded after brief pause.
She nodded in satisfaction. "Your seal is impressive," she continued, "but it isn't finished."
"No. It isn't."
"You intend to improve it?"
"In time." I glanced down briefly. "I understand the principles behind it, but not enough about the human body to refine it as far as I'd like."
Mito studied me for another moment before asking, "Then I take it that isn't the crazy seal my granddaughter was talking about?"
"No." I shook my head. "That is a completely different project."
I paused, considering how much I was willing to reveal.
Then I decided there was little point in coming here if I wasn't prepared to explain the problem that had brought me to her in the first place.
"I've been trying to develop a long-distance communication system using Fūinjutsu," I began, then paused, considering how best to explain what I meant.
The problem was that, from this world's perspective, long-distance communication wasn't really considered a problem that needed solving.
Konoha already had a clan capable of communicating across considerable distances through their own abilities.
Kumogakure had another clan capable of teleporting inanimate objects over long distances, which included scrolls carrying written information.
As for the other villages, I wasn't sure what methods they had developed, but clearly none of them had felt the need to create a dedicated communication network.
To them, information already moved well and fast enough.
What I was proposing was different.
I wasn't just trying to make communication possible, I was trying to make it infrastructure, something ordinary people could access through standardized devices and fixed networks rather than relying on individual shinobi, clan abilities, or specialized techniques.
And that was exactly what made this dangerous.
If Mito understood the potential of what I was building, she might see it as something worth introducing to Konoha. Once that happened, it wouldn't remain mine.
A reliable, large-scale communication network could change how intelligence was gathered, how orders were transmitted, how merchants conducted business, and even how the villages coordinated during war.
It could shift the balance of power.
That was a gamble I wasn't willing to take.
"You don't need to worry too much, young man." Her voice cut through my thoughts and I raised my head to meet her gaze. "As I said, I'm an old lady well over her time. Whatever it is remains yours to do as you please."
I didn't understand how she knew what I was thinking, but those words put my heart at ease slightly.
There were not many people you could trust to keep their words in this world. This was a world that took deception as a necessary skill for survival after all.
"The basic principle is simple enough. Two users should be able to exchange information through linked seals without needing to remain within their individual chakra sensory range or rely on a specialized shinobi technique."
Tsunade's eyes widened. "You mean like talking from really far away?"
"Eventually."
I glanced at Mito who nodded and said. "Do go on."
"I want to build a network of fixed sealing nodes," I explained. "Each node would receive a message from one communication tag, identify its intended recipient, and relay it through the network until it reaches the correct tag."
Tsunade tilted her head. "So… like the Yamanaka?"
"Yes, something like the Yamanaka." I nodded. "But there's a fundamental difference."
"Their technique establishes a direct mental connection using a specialized Ninjutsu tied to their clan's unique abilities. Mine wouldn't require a Kekkei Genkai or any particular bloodline."
"The seals would handle the connection themselves, converting the information into structured frequency, transmitting them through the network, and reconstructing them at the receiving end."
I paused.
"Think of it as a network of post offices. You don't need to know where the recipient is, you only need their registered address. Once you send the message to the nearest node, the network identifies that address and routes the message through the appropriate nodes until it reaches them."
Mito's eyes narrowed slightly with the look of a master craftsman realizing that someone had taken something everyone simply accepted as a matter of specialized clan techniques and approached it from an entirely different perspective.
"But," I continued, "there's a problem."
"Power?" she asked.
I froze. "Exactly"
"You wouldn't be here if it was a matter of structure," Mito said, lowering her tea. "Structure you can brute force with enough trial and error. But stable chakra cycling, especially across a distributed seal array… that's a different matter."
"Exactly" I nodded slowly. "The relay nodes burn through the seal too quickly. Accumulation becomes another problem when there's nowhere for the excess to go, and once the feedback starts, the entire seal matrix destabilizes. Even the anchor stones can only handle so many transmission cycles before the formulas begin to degrade."
I leaned forward. "So here's the real question: what would you use? If you were trying to keep a seal powered permanently. Long-term chakra cycling. Stable output. Sustainable flow."
Mito looked up at the cherry blossoms overhead. For a moment, I thought she might give me some cryptic Daoist line.
Instead, she said, "A living anchor."
"Hmm?"
"A living source at the center of the network," she clarified, returning her gaze to me. "Someone whose chakra pathways are strong enough to continuously circulate and replenish the system. The principle isn't particularly different from how certain large-scale barrier techniques are maintained."
Tsunade who has been listening from the side frowned. "But wouldn't that person burn out eventually?"
Oh? Didn't know she was actually keeping up. I shot her a glance before returning my gaze to Mito
"Not if the seal were designed to work with the person's natural recovery rate rather than against it. The output would be slower, but the system could remain stable indefinitely."
As she said that, my mind immediately began running through the possibilities.
A living anchor could work. A controlled flow of chakra, distributed across the network and replenished naturally over time.
But it was hardly ideal. It would turn the entire system into a dependency on one person's body.
Worse, it would create a point of failure no amount of clever Fuinjutsu could completely eliminate. For example…
"What happens if the anchor dies?" I asked.
"Your network dies with it."
"And if they refuse to cooperate?"
"Then it becomes a hostage situation."
My point exactly.
Mito took another sip of tea. "A living anchor is a solution," she said calmly. "Not necessarily the solution you should choose."
Now that distinction caught my attention.
"Why are you trying to keep the seal powered permanently?" she asked and set her cup down. "A seal doesn't need to be constantly active to function. You're treating continuous operation as a requirement when perhaps it shouldn't be one."
"But the network needs to remain available." I pointed out.
"Available doesn't mean constantly consuming."
I went quiet and she continued, "Think about your own chakra. You don't maintain the same output every moment of the day. You circulate it when necessary, suppress it when you don't, and draw on your reserves when the situation demands it."
I frowned. "So you're suggesting a dormant state?"
"Partially. Or a reservoir."
My eyes narrowed. "A seal that accumulates energy gradually, stores it, then releases it only when the system requires it."
"Exactly."
I leaned back slightly, considering the idea.
That could solve part of the problem. Instead of forcing the entire network to maintain a constant output, the nodes could remain mostly dormant and draw from stored energy whenever a transmission occurred.
But there was still another problem.
The source.
A reservoir still needed to be filled.
"What would you use to replenish it?" I asked and she smiled faintly.
"Now you're asking the right question."
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