It was a sensational fight that lasted just four minutes, 29 seconds: Yamamoto looked like the Kid of old at times, throwing hard power punches and moving around the Octagon quickly. But Lee did a great job of blocking most of Yamamoto's bombs, and once the fight went to the ground it was Lee's time to shine.
Lee initially tried to submit Yamamoto with a triangle choke, but when he couldn't lock that up, he beautifully transitioned into an arm bar that forced Yamamoto to tap.
"It's a dream come true," Lee said. "Being in the UFC is a dream come true. Fighting in Japan, fighting one of my favorite fighters of all time, Kid Yamamoto, a legend, I'm just the happiest person in the world right now."
The win improves Lee's record to 12-7-1. Yamamoto falls to 18-7-1, and he has now lost five of his last six. Yamamoto is one of the all-time greats, but he may be just about done.
"All I can say is I am disappointed," Yamamoto said. "I really, really wanted to win in Japan."