Knockoff Byakugan

"The power of the Infrasonic Radar Technique still needed improvement."

Umino Sasuke shook his head, clearly dissatisfied with the result.

His original plan had been to use infrasound to shake these Golden Mandarin Fish to death, but he had only knocked out a large number of nearby fish along with them.

Its offensive power could not be called strong—only extremely weak. It merely stunned the fish, and it still could not strike a precise target, which was why it had knocked out so many fish nearby as well.

"Captain, have you been spending so frequently lately because you're short on cash? Planning to sell fish to pay for your brothel visits?"

Tejudo grinned mischievously as he joked, waiting downstream and scooping the floating freshwater fish into a wooden bucket one by one.

"Kid, looks like you're itching for another beating."

Umino Sasuke kicked the river's surface, splashing a huge wave of water onto Tejudo's face.

Caught off guard by the sudden wave, Tejudo was already carrying a large bucket of fish, and the Chakra beneath his feet immediately became unstable.

Splash.

Tejudo fell straight into the water and cried out in panic.

Water Release: Water Prison Technique.

Umino Sasuke rapidly formed hand seals and released a relatively small binding water prison, trapping the large wooden bucket that had fallen into the river along with the scattered catch inside it.

Then Umino Sasuke flicked his hand and hurled the binding water prison onto the riverbank.

"Liao, hurry up and fill that bucket with rocks."

"Captain, no!"

Tejudo had just crawled out of the water when he heard Umino Sasuke's vicious words and immediately began to wail.

"Kid, either lose some weight or obediently practice Water Walking in this river and improve your Chakra Control."

Umino Sasuke directed Inuzuka Ryo to hand the bucket full of rocks to Tejudo, making him continue his training in the river.

He truly was not taking the chance to settle a personal grudge. This guy had probably been eating too much rich food lately and had put on another whole layer of fat.

He really could not see how these freshwater fish were supposed to be so nourishing. Why had Inuzuka Ryo not gotten fat from eating them too? Only Tejyuya and Xiao Xiao seemed to look different with every passing day.

He and Inuzuka Ryo had instead grown noticeably thinner. It seemed they had not been getting enough carbohydrates lately. They ought to switch to millet for a while.

"Captain, what kind of ninjutsu was that? You actually knocked all the fish in the water unconscious?"

Seeing Umino Sasuke practicing a new ninjutsu, Inuzuka Ryo finally voiced the curiosity he had been holding in for days.

Born into a shinobi clan, he was quite knowledgeable, yet he had never seen a ninjutsu that could silently attack the inside of an object. Though it appeared rather weak, it would have remarkable effects if used to disrupt a ninja's hand seals.

That was why he was so curious. What kind of ninjutsu could silently attack the interior of an object? Even advanced Wind Release could not achieve such silence, could it?

"This is the Earth-Shaking Secret Technique of my Umino Clan."

Umino Sasuke did not wish to say much and reveal too much information about this ninjutsu, so he brushed it off as a clan secret jutsu.

As for how an ordinary fish-selling family could possess a secret technique, the answer was simple: whose ancestors had not once been wealthy? Common civilians could not pass down their bloodlines for many generations. Of those who had endured into later generations, which did not have at least a little noble blood?

"Mm." Inuzuka Ryo nodded, becoming even more respectful toward Umino Sasuke.

So the captain's ancestors had been shinobi as well. Perhaps during the Warring States Period, they had even been an exceptionally secretive shinobi clan that had merely declined over time. Otherwise, there was no way their Earth-Shaking Secret Technique would not have been recorded in the clan archives.

The Inuzuka Clan's collection might not have been as extensive as those of the Uchiha or Senju Clan, but as intelligence shinobi who specialized in reconnaissance, they had made special collections of information on many shinobi clans. Thus, when it came to shinobi clan intelligence, they were not far inferior to those great noble clans.

Even the Inuzuka Clan had no record of the Earth-Shaking Secret Technique, so the Umino Clan had to have been a secretive shinobi clan.

As for why it had declined, the Shinobi World had undergone a tremendous upheaval more than thirty years ago. The Five Great Ninja Villages had been founded, and countless shinobi clans had vanished into the river of history.

The Umino Clan had likely declined for the same reason.

Inuzuka Ryo had many more doubts, but he did not ask further. Clan secret jutsu were taboo subjects, after all, so he simply returned to his work.

"Heh heh." Umino Sasuke smiled knowingly. There was no Earth-Shaking Secret Technique at all. It was merely a fledgling ninjutsu he had developed based on research materials about tiger summoning beasts, combined with his experience developing Water Bat ultrasound.

For the time being, he called this fledgling ninjutsu the Infrasonic Radar Technique. The ninjutsu he had previously developed from Water Bat ultrasound would be called the Ultrasonic Radar Technique.

The two ninjutsu each had their own strengths and weaknesses, based on the characteristics of infrasound and ultrasound.

The Ultrasonic Radar Technique possessed the traits of ultrasound. Its advantage was high sensory precision and extremely powerful insight and perception. Its disadvantage was insufficient penetration, which limited its sensing range; as the density of the medium and the distance increased, Chakra consumption also intensified.

The Infrasonic Radar Technique possessed the traits of infrasound. Its advantage was extremely strong penetration and an exceptionally broad sensing range. Its disadvantage was low sensory precision: it could only mark approximate locations and could not discern details. The greater the required precision, the more Chakra it consumed.

"It seemed the Infrasonic Radar Technique was more practical for reconnaissance within a defense zone."

This Infrasonic Radar Technique was essentially like a blurred version of a high-purity Byakugan. It could conduct large-scale reconnaissance over a radius of up to five kilometers.

The Ultrasonic Radar Technique, meanwhile, was essentially like a low-purity Byakugan. It could perform highly precise insight and perception, though its sensing range was smaller. Its current maximum range was three kilometers, and the closer the target, the less Chakra it consumed. Within a range of only two hundred meters, it could be kept active throughout an entire battle like the Byakugan, providing three-hundred-sixty-degree perception without blind spots and observing the whole battlefield.

In other words, the Infrasonic Radar Technique was more practical for wide-range reconnaissance and perception, while the Ultrasonic Radar Technique was more practical for close-range insight during combat.

"Finally, I had a little sense of security."

After mastering these two sound-wave sensory ninjutsu, especially the low-frequency Infrasonic Radar Technique, his safety had greatly increased. Everything within five kilometers beyond this defense zone was now within his sensory range.

As long as he released a low-frequency Infrasonic Radar Technique from time to time, he could detect whether any ninja had entered his defense zone.

Of course, beyond three kilometers, it could only serve as an early-warning function, marking approximate locations without identifying details.

If he wished to continue investigating and identify someone's specific identity, he could then release the Ultrasonic Radar Technique for more precise insight and perception.