"Alright!"

Yuji takes a deep breath and concentrates. He senses the chakra flowing through the chakra flowing his body and slowly directs the chakra toward his right hand.

'It's not like I can discharge it out of my body even if I want to.'

He clenches his fist and infuses the chakra into it for a few seconds.

"This much should be enough!"

Tsunade's voice snaps him out of his thoughts.

He takes a Taijutsu fist stance to exert maximum force through his punch.

Haa…

The next second, Yuji punches the wooden dummy with his full power.

BANG…

A muffled sound echoes across the entire training hallway. The wooden dummy shakes from the impact. Yuji's punch leaves a slight depression in the wooden dummy. He slowly withdraws his fist.

"That was an impressive punch!"

Hiruzen praises him with a smile.

'This wooden dummy is even harder than reinforced steel. Chakra techniques sure are impressive.'

Yuji stares at the multiple symbols on the wooden dummy with an incredulous gaze.

'These symbols and runes are similar to the one I saw in the diary and the one Kushina is practicing. Perhaps it's some sort of technique using these symbols and chakra.'

Yuji steps back while the shinobi in the training ground inspects the wooden dummy. After a few seconds, he reports to Hiruzen.

"Hokage-sama, the force behind this chakra-enhanced punch is enough to deal serious internal injuries to a genin, knock out a chunnin, and deal a fair amount of damage to a jounin if caught off guard."

"Hmm… how is it?" Hiruzen turns to Tsunade for an explanation.

"Given his physical strength and chakra control, this is the expected result."

"Hmm… then let's take a look at his improved version."

The anbu turns to Yuji.

"Boy, are you ready?"

"Mm…"

Yuji nods and walks towards the second wooden dummy. He takes a deep breath and concentrates. The dark black chakra in his body flows through his chakra pathway and slowly gathers in his fist.

Soon, he reaches the previous chakra limit. Yuji continues to concentrate more chakra on his fist. His knuckles turn black as he continues to circulate the chakra in his fist. Yuji's face turns red as he reaches his limit.

'I can't hold back anymore.'

He takes a taijutsu fist stance and punches the wooden dummy. The force from the punch compresses the air in front of his fist. Some chip marks appear on the wooden dummy even before the punch lands on the dummy.

Tsunade, Hiruzen, and other shinobis have an incredulous expression on their face.

BANG… BOOM…

Another muffled noise followed by an explosive sound rings through the hallway. The powerful force from the punch produces a strong wind current that ruffles Yuji's black hair.

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As soon as Yuji's fist comes in contact with the wooden dummy, a minuscule amount of dark black chakra escapes from his fist. This chakra drills a hole through the wooden dummy. Soon, the force from the punch transfers to the dummy. The force produced by the compression of chakra and air particles has a slight spiraling effect on it. The powerful punch blows a portion of the wooden dummy's waist.

The force from the punch continues to travel forward and leaves a slight indention on the wall behind the dummy.

"Incredible!"

The eyes of the Anbu widen at the sight.

Whoosh…

Before Yuji and the anbu could react, Tsunade flickered beside him. She quickly grabs his hand.

"Your hand!"

Tsunade's sudden action startles everyone and draws their attention to Yuji's hand.

Blood splatters out of his hand. Some of the bones are protruding out of the flesh.

Soon, the pain transfers to Yuji's pain receptors. He groans in pain and involuntarily pulls his hand from Tsunade's grasp.

"Let me treat your hand!"

Tsunade firmly grasps his hand and uses her 'Mystic Palm Technique' to treat the wound while inspecting the injury.

"This is quite a serious injury. Half of your phalanges bones are broken, two of your metacarpal bones have shattered, and five of your carpal bones have cracked." She analyzes the injury in his hand.

"I will have to perform surgery to fix your hand." Tsunade issues her verdict.

She concentrates her chakra on her fingertips and creates an ultra-thin chakra scalpel. She uses the chakra scalpel to poke several nerves in Yuji's hand to perform Rhizotomy.

"I have severed some of the nerves on your hand to relieve the pain. Also, I have blocked the tenketsu point around your arm to prevent your chakra from further harming your hand."

She wraps her hand around Yuji's waist and flickers away from the training hall without sparing a single glance at Hiruzen and others.

Sigh…

Hiruzen shakes his head as he understands the urgency of the situation. He glances at the brutally destroyed wooden dummy.

"What did you two notice?" He speaks to no one in particular.

Whoosh…

Two figure flickers in front of Hiruzen. They remove their animal mask and bow to Hiruzen. One of the shinobi has pupilless white eyes while the other shinobi has red eyes with black pupils and three black tomoes in the iris.

The person with a pupilless white eye steps forward and reports.

"I observed the flow of chakra in his hand with my Byakugan. This kid has a peculiar chakra with much higher density than normal."

"Hmm… how peculiar?"

"His chakra is almost three times denser than usual. As a result of this, his chakra system has to bear more burden than normal. If my speculation is correct, this kid might be unable to perform ninjutsu."

"I heard that much from Tsunade. This kid has barely any talent for ninjutsu." Hiruzen sighs and shakes his head.

"What about his technique?"

"During his first punch, he circulated the chakra through his body and slowly concentrated it into a fist. This is quite similar to the regular medical ninjutsu and is an application of Lady Tsunade's technique. When he punched the wooden dummy with his fist, a protective membrane of chakra coated his fist. This membrane not only enhanced the strength of his first but also dispersed the recoil from the reactive force of the punch."

He gives a detailed explanation of the technique.

"Hmm… that's similar to Tsunade's technique. What about the second punch?" Hiruzen's face turns serious.

"During his second punch, he circulated and infused the chakra in his fist like the previous time, but this time, the concentration of chakra was much higher. Normally, after reaching a certain concentration of chakra at a part of the body; the chakra pathway or the tenketsu points will reject a further increase in the chakra. However, in his case, his chakra pathway and tenketsu points were completely fine. It was part of the reason he was able to concentrate more chakra in his fist.

However, after coating his fist with a layer of chakra, the excessive chakra seeped into his bones. It was the reason his fist turned black at a few points and was also the cause of the fracture in his hand, since his bones were too fragile to handle the chakra."

"So, this incredulous strength was a result of overexerting his chakra!"

"Yes, hokage-sama!" The anbu nods.

"Hmm… there are quite harsh requirements for this technique and the result isn't optimal."

Hiruzen recalls the incident in the park.

'Perhaps this kid got lucky at that moment.'

He turns his gaze to the second Anbu with red eyes.

"What else did you notice?"

"Hokage-sama, his normal punch was fine, but I noticed a peculiarity about his enhanced punch."

"Oh!" Hiruzen raises an eyebrow.

"Just before his fist came in contact with the wooden dummy, the excessive chakra stored in his bones escaped from his body and seeped into the wooden dummy. This chakra was highly corrosive, not only it disrupted the Fuinjutsu seals on the dummy, it even weakened the structure of the wood. Thus, his punch dealt such exaggerated damage. However, as a side-effect, his bones also suffered the same fate as that wood."

"I see. It's quite a powerful technique with serious side effects. Still, I am quite interested in the density and corrosive property of his chakra. I have never heard of anything like that before." Hiruzen ponders.

He dismisses the anbu and returns to his office.

"Looks like there is quite an interesting batch of students in this generation. I am looking forward to their future achievements."