Watching Kakashi's excitement, Shinji smiled inwardly, though nothing showed on his face.
Everything had been part of his plan. This was exactly the effect he wanted. Only by giving the village what it wanted could he get it to keep sending Konoha Ninja into Takamagahara.
Soon, Shinji released the dojutsu.
After exiting Shinji's Takamagahara, Kakashi instinctively checked the time. He found that only five minutes had passed since he entered, even though by his own perception, he had spent at least twenty minutes inside.
Kakashi couldn't help letting out a surprised "Huh?"
Seeing his reaction, Shinji explained, "I sped up time inside Takamagahara. If time passed at the same rate inside and out, it would be a waste!"
"..."
Kakashi fell silent.
When Shinji had introduced the technique, he had indeed said that he could control all matter and time within Takamagahara. But Kakashi had thought Shinji was boasting. He hadn't expected Shinji to actually be able to control the flow of time inside it.
Then Kakashi ventured a guess. "One-quarter?"
Shinji nodded. "You really are perceptive, Kakashi-sensei!"
The flow of time inside Takamagahara had indeed been one-quarter that of the real world. Most people couldn't sense the difference as clearly as Kakashi had.
"One-quarter..." Kakashi paused, then murmured, "So training for four hours in Takamagahara is equivalent to only one hour in the real world. That's an incredible level of efficiency!"
Shinji replied casually, "It's not bad."
In truth, one-quarter speed wasn't Takamagahara's limit.
As long as he didn't care about the cost in Dojutsu, Shinji could make time pass inside Takamagahara just as it did with Tsukuyomi—one instant could feel like an entire lifetime. But there was no need for that.
After repeatedly testing it with Nameless, he had found that keeping time in Takamagahara at one-quarter the