Sasuke watched the final strong fighters battle. Their swordsmanship was all quite impressive. Though he did not understand it, he could still tell who was better in combat. The most essential thing in swordsmanship was speed—whether drawing or swinging the blade required speed. Then came strength; at the very least, it could not be too lacking. Only after that came technique. In other words, the foundation of swordsmanship was speed and strength. Sasuke had an advantage in both. Years of wearing weights had given him considerable speed and power, and he was still persisting with his training even now.
He also had a foundation in technique. With a weapon like a sword, there were not many basic movements, but becoming familiar with them required swinging it hundreds or thousands of times every day while paying attention to the coordination of every part of the body. Sasuke's Sharingan perfectly copied all the Sword Testers' movements. Later, he could compare them and see which movements suited him best and which methods of exerting force were the most correct. Once you had mastered all the basics and could execute them perfectly at any time in battle, then you could use more difficult techniques.
As Sasuke watched and thought, the number of people in the arena dwindled to fifteen. Then they suddenly stopped and all looked toward him. Sasuke was taken aback as well. Why are they all looking at me? Is it because I haven't joined the battle this whole time? At that moment, Tenbu Shinzo's heart leaped into his throat. The remaining people were samurai or ninja hired by noble families. These samurai were quite famous in the Land of Iron, while most of the ninja were from Kumogakure, with one from Kirigakure. Their exact ranks were unclear. They definitely intended to