Sarutobi Hiruzen doesn't have time to accompany them to practice ninjutsu.
As for Uchiha Itachi, the little guy needs to report to his father, Uchiha Fugaku, that he will be joining the Dark Department after the New Year.
The entire Practice Field No. 3 only had Kakashi Hatake and Akihara Kagura left. Kakashi Hatake leaned against a tree, reading the scroll on Flying Thunder God Jutsu.
Akihara Kagura practiced Woodman Jutsu symbolically for a while, then saw Kakashi Hatake frowning, seemingly encountering some difficulty.
"Why the long face here?"
Akihara Kagura landed beside Kakashi Hatake and softly asked, "Is the Jutsu really that hard? It looks like you're suffering more than killing someone."
"Very hard."
Kakashi Hatake nodded, lowering his voice: "Back then, Minato-sensei wanted to teach me this Jutsu, but I always thought the shortcomings of this Jutsu were too apparent, and I neither had the talent nor worked hard enough..."
Flying Thunder God Jutsu drains a lot of chakra.
Kakashi Hatake transplanted a Sharingan but didn't have the Uchiha Clan's genes. The Sharingan couldn't be turned off and kept his chakra constantly draining.
Besides, the deaths of Uchiha Obito and Nohara Rin in succession were crucial reasons he didn't learn it; he was living like a walking corpse.
Until Uchiha Obito came back to life, demonstrating powerful space-time dojutsu, Kakashi Hatake wanted to bring Uchiha Obito back to Konoha, which reignited his interest in learning Flying Thunder God Jutsu.
"How could any ninjutsu be difficult?"
Akihara Kagura shrugged indifferently, continuing, "Isn't it just about forming the hand seals and knowing the name and effect of the Jutsu?"
"Flying Thunder God Jutsu doesn't require hand seals."
Kakashi Hatake sighed softly, continuing, "It's a no-seal ninjutsu. It can only be controlled by carefully manipulating the flow of chakra within oneself..."
"A no-seal ninjutsu?"
Akihara Kagura immediately became interested, nonchalantly asking, "How is this Jutsu performed? What is its effect?"
"First, you need to leave a Flying Thunder God Jutsu mark with chakra at the target location, then activate the Flying Thunder God Jutsu to instantly move to the marked location..."
Kakashi Hatake didn't mind sharing this with Akihara Kagura. Akihara Kagura was a companion, and these secrets weren't unknown, not particularly secretive in Konoha.
After Kakashi Hatake finished speaking, he rubbed his own forehead and extended his hand: "For now, I can't even manage to condense a Flying Thunder God Jutsu mark..."
The Flying Thunder God Jutsu is indeed challenging.
In fact, the most important part is just the first step: condensing a Flying Thunder God Jutsu mark, which must include trackable space-time coordinates.
Once you can take the first step, the rest is much easier.
"Got it."
Akihara Kagura patted Kakashi Hatake's shoulder, a small leaf mark quietly falling onto Kakashi Hatake's shoulder, then said, "Keep studying here, don't move around, I'll go buy something real quick."
[System Notice]: [Ninja Professor] trait activated, the host possesses space-time attributes, chakra amount reaches A-level, the secretly learning [Flying Thunder God Jutsu] aligns with ninjutsu theory, [Flying Thunder God Jutsu] learned successfully!
[System Notice]: You have successfully learned [Flying Thunder God Jutsu]
[Flying Thunder God Jutsu (Requires no hand seals, utilizes the Flying Thunder God Jutsu mark for coordinate targeting, allowing instantaneous movement of the body. The movement speed is so fast that enemies cannot perceive it! The technique user can carry objects and people along with the Flying Thunder God Jutsu's instant movement. Long-distance and large object transportation will consume more chakra from the technique user.)]
Ten minutes later.
While Kakashi Hatake was still watching the scroll, a figure suddenly appeared next to him, catching his attention from the corner of his eye.
"Back so soon?"
Kakashi Hatake looked up, seeing Akihara Kagura holding two cups of pear juice, and suddenly realized Akihara Kagura's appearance method seemed off!
"This Flying Thunder God Jutsu is actually quite simple."
Akihara Kagura handed the pear juice to Kakashi Hatake, nonchalantly pointing to the leaf mark on his shoulder, explaining, "First make a mark like this, then run far away, and instantaneously teleport back. Though it does consume some chakra, it's really convenient for going out to buy things..."
The Flying Thunder God Jutsu is indeed quite convenient.
Learning this Jutsu, there's no need to hide it as a trump card, as Flying Thunder God Jutsu will greatly facilitate life in the future; Akihara Kagura has plenty of trump cards already.
"???"
Kakashi Hatake felt full of question marks.
Isn't this kid's way of learning too abstract? I only gave a simple introduction to the Flying Thunder God Jutsu theory, and how did he learn it?
Kakashi Hatake, holding onto Flying Thunder God Jutsu study notes left by his teacher, had yet to figure out the first step of condensing the Flying Thunder God mark!
And this Jutsu isn't meant to make buying things convenient!
"First, you condense a mark like this..."
Akihara Kagura seemed to understand Kakashi Hatake's confusion, raising his hand to condense a leaf mark, demonstrating it to Kakashi Hatake.
"Wait a minute..."
Kakashi Hatake rubbed his forehead, voicing his doubt: "How exactly do you condense this mark?"
"With chakra..."
"No..."
Kakashi Hatake felt he wasn't clear, adding, "How do you condense space-time coordinates within the mark?"
"What are space-time coordinates?"
Akihara Kagura's eyes flashed with confusion appropriately.
"Seriously..."
Kakashi Hatake lowered his head somewhat hopelessly, feeling a bit of a headache: "You managed to learn Flying Thunder God Jutsu without understanding the concept of space-time coordinates?"
"Just like this."
Akihara Kagura continued to demonstrate, earnestly hoping Kakashi Hatake could understand his meaning: "You just need to create a mark that allows me to teleport over, like feeling a summoning force from the mark itself..."
Kakashi Hatake felt his head hurt even more: "But without space-time coordinates in the mark, how can it be used for teleportation targeting?"
Kakashi Hatake felt the world had an issue, here he was, clueless about Flying Thunder God Jutsu, trying to teach someone who instantaneously learned it to understand it.
Kakashi Hatake could only use the simplest jutsu as an example: "Like Summoning Jutsu's summoning contract, you need to form a hand seal sequence[Boar-Dog-Rooster-Monkey-Sheep] to unleash a summoning array, using this array as the space-time coordinates for summoning a ninja beast..."
As Kakashi Hatake spoke, he suddenly realized something, and his eyes lit up: "Essentially, the summoning array of the Summoning Jutsu and the mark of the Flying Thunder God Jutsu both contain space-time coordinates, I should thoroughly study the Summoning Jutsu first..."
"..."
Akihara Kagura nodded helplessly, providing Kakashi Hatake one last piece of advice: "However, this Jutsu does consume a significant amount of chakra, and it's a bit troublesome to use sometimes, requiring precise perception of the mark's location. Fortunately, my perception ability is decent..."