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### Chapter 7: Awakening the Chakra Core
The next morning, Naruto and Biwako went to the Sarutobi Clan's training ground. The early morning sun bathed the area in a golden hue, casting long shadows of the trees and illuminating the dew on the grass.
"Okay, Naruto, today we will start your training," Biwako began, her voice steady and calming. "Now sit down, relax all your muscles, and focus on my voice."
Naruto sat in a cross-legged position on the ground, taking a deep breath to center himself. "Naruto, follow my instructions. Focus all your attention on your belly button."
Naruto did as he was told, concentrating intensely on his belly button. The sounds of the forest faded away as he directed all his attention inward. After five minutes, Biwako continued, "Now, search for a plastic-like membrane, also known as the Chakra Core."
Naruto diligently searched for his core. He visualized his chakra flowing within him, looking for the elusive membrane Biwako described. He spent three hours in deep concentration, his mind probing every corner of his being. Eventually, Biwako's voice brought him back to the present. "That's enough for today," she said gently.
Naruto opened his eyes, a hint of frustration evident in his expression. He wanted to protest, but Biwako anticipated his reaction. "It's normal for all shinobis. No one can become an elite in just one day," she reassured him, her eyes kind.
This process continued for six days. Each day, Naruto would sit and meditate, searching for his chakra core. Each day, he would come up empty-handed. Despite his frustration, he trusted Biwako and persevered.
On the seventh day, the training ground was quieter than usual. The anticipation in the air was palpable. Naruto sat down and began his meditation. As he delved deeper into his consciousness, he found something different. It was not a membrane but a big spherical structure that looked metallic.
"Oba-san told me that I would find a thin membrane, but this is neither thin nor like plastic. Maybe this is my chakra core. Well, it is my seventh day. At least I should examine this structure," thought Naruto.
With a mixture of curiosity and determination, he reached out and touched the metallic structure.
Boom! A massive energy surge released from Naruto's body, radiating outward in a powerful wave. The ground trembled, and a wave of emotions followed, spreading through the entire Konoha village. People paused in their daily activities, sensing the powerful energy and emotions.
Biwako, who was nearby, tried to stop Naruto after the burst of energy, but she was overwhelmed by the wave of emotions. The intensity of the feelings was unlike anything she had ever experienced, rendering her momentarily helpless.
In his office, Hiruzen sensed the disturbance immediately. The surge of energy and emotions was impossible to ignore. He and his ANBU guard left the office via Shunshin, arriving swiftly at the Sarutobi grounds. There, he saw his wife and Naruto both unconscious on the ground.
He quickly ordered his ANBU to check them for injuries, his eyes scanning the surroundings for any signs of an attack or ambush. His worry was evident, but after a thorough check, the ANBU reported that both Naruto and Biwako were unharmed.
Relieved but still cautious, Hiruzen lifted Naruto and Biwako and brought them to his house. He laid them gently on futons and instructed the household staff to keep a close eye on them. As he watched over them, he couldn't help but wonder what had happened and what it meant for Naruto's future.