Minato's pupils contracted, his mouth slightly agape.
"It took me three full years to develop the Rasengan. The first year was figuring out the shape theory, the second year was completing the balance of rotation and power, and only in the third year did I finally manage to maintain it stably."
Minato paused, watching the Rasengan in Naruto's palm, which was extremely stable.
He was silent for a long time, then revealed a proud yet somewhat dazed smile. "Naruto, you've broken my record. To form it in one go at this level..."
Minato added in his heart, 'It doesn't feel like you just learned it, it feels more like an action you have performed countless times and are familiar with.'
Naruto nodded, not showing conceit. With Absolute Control, learning Rasengan was not difficult.
Next was Kushina's teaching time.
"Naruto, it's Mom's turn now."
Kushina rolled up her sleeves, eagerly preparing to start the Fuinjutsu lesson.
But Minato reached out and stopped her. "Kushina, the essence of Fuinjutsu is manipulating barriers and contracts. It's different from Rasengan. No matter how much of a genius Naruto is, it's impossible to learn an entire system of Fuinjutsu in such a short time."
"Besides, we don't have Shadow Clones to demonstrate. Relying solely on explaining the diagrams and characters would exhaust all your Chakra on a single technique."
"For now, let me teach Naruto the Flying Thunder God Technique."
Kushina's expression stiffened for a moment. She opened her mouth to argue, but Minato was right, she couldn't refute him.
"I understand."
Kushina eventually calmed down and turned to Naruto. "Naruto, listen carefully. Mom isn't teaching you one or two Fuinjutsu, but the underlying framework of Fuinjutsu. I will teach you all the principles of the Fuinjutsu passed down through generations of the Uzumaki clan."
"From binding styles to suppression styles, from barrier deployment to seal expansion, from single contraction to multi-layered nesting—all the theories."
"I don't have time to stay by your side and practice with you. You have to use your brain to absorb all of this, then go back and practice it over and over again on your own."
Naruto nodded.
Next, Minato began teaching him his core ultimate technique, the Flying Thunder God Technique.
"The Flying Thunder God Technique is essentially a type of space-time Ninjutsu. Its core is to fix Chakra in the form of a technique formula coordinate at any point in space, and then trigger the technique to teleport."
"The Ninja World calls me the Yellow Flash because the Flying Thunder God Technique allows for zero-delay displacement on the battlefield. But it has two fatal barriers."
"First, the engraving of the technique formula must be fast and accurate. The pattern of the formula cannot have any deviations. Even if just one of the marks is drawn incorrectly, your teleportation target point will be off."
"Second, at the moment of activation, it requires consuming a massive amount of Chakra and performing extremely complex coordinate calculations."
"Ordinary people's brains cannot calculate the spatial deviation between their own position and the target formula."
"Given that time is limited, I will break down the complete diagram of the Flying Thunder God Technique, analyze it for you step by step, and orally explain the essence of spatial perception during teleportation."
"As for how far you can go in the future, it depends on your talent and how much time you spend practicing when you go back."
Absolute Control allowed Naruto to manage his brain's memory efficiency. Every word Minato spoke and every line of the technique formula was written into the most stable memory area of his brain.
Then Minato supplemented it with a large amount of combat knowledge and techniques for high-level ninjas.
For example, how to precisely concentrate Chakra on the soles of the feet to increase explosive dash speed, how to cover the surface of the hands and arms with Chakra to increase the power of Taijutsu attacks, how to switch breathing patterns during combat to save Chakra consumption, and how to judge the next attack direction based on the subtle movements of an enemy's shoulders.
These were the essence of the experience Minato had accumulated through countless battles. Originally, it would have taken months to teach them hands-on at the training ground, but now he could only explain them, leaving all the practice to Naruto's own time and sweat.
Naruto did not lose focus for a second while listening. And it wasn't just listening, he was using Absolute Control to manage his brain, accurately archiving and organizing every piece of knowledge.
Every sentence Minato spoke was completely etched into the junction area between his short-term and long-term memory. Any keyword trigger would automatically bring up all related details.
Finally, before her Chakra was completely exhausted, Kushina poured all her basic principles of Fuinjutsu onto Naruto at once.
"Listen well, Naruto. Adamantine Sealing Chains is a Kekkei Genkai of the Uzumaki clan. If you awaken it in the future, you can use it as a foundation to combine with Chakra to build suppression barriers in the form of chains. The hand seal sequence is Rat-Boar-Rabbit."
"The deployment mode for the Four Symbols Seal is to set the lock first, then nest."
"The variation of the Fire Sealing Method requires changing to reverse Chakra flow at the third hand seal."
Kushina spoke extremely fast, delivering a large amount of content in one breath.
When Kushina paused to catch her breath, Naruto said, "Mom, I've remembered it all."
Kushina looked at Naruto, stunned for a moment, then smiled and raised her hand to ruffle his hair.
"That's my son, alright."
Finally, after who knows how long, both of their Chakra was exhausted to the limit. Tiny cracks began to appear at the edges of the golden space. Their figures began to become increasingly transparent and golden light particles continuously drifted from the edges of their bodies.
Naruto watched their figures fading bit by bit and spoke, "Dad, give me the key to sealing Nine-Tails."
Minato smiled and nodded, without asking any more questions.
His fingers quickly formed a few hand seals. Every moment of the hand seals was firmly captured by Naruto's eyes.
Minato felt a slight sense of relief as he transferred the final administrative authority between himself and the Eight Trigrams Sealing Style to Naruto.
When the last seal was completed, a faint ray of Chakra flew out from Minato's heart area and merged into Naruto's chest.
Kushina bent down, tears rolling down her cheeks, shattering into light before they could even hit the ground.
"Naruto, Mom never thought I would be able to accompany you until you grew this big. Although it's very short, just being able to talk to you like this, Mom is already very happy."
"I'm sorry... Naruto, you have to walk the path of the future by yourself."
"We both love you."
Minato stepped forward and stood side by side with Kushina.
"From here on, I leave it to you, Naruto. We can't accompany you any longer."
After Minato finished speaking, he smiled and reached out to Naruto. His fingers were already completely transparent, the knuckles almost impossible to see.
Naruto looked at the couple and said, "Thank you, Dad, Mom."
***
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