On October 31, 2021, the French Open final Changshan Gantai won the biggest title of his career by defeating the world's fourth-placed Chinese Taipei player Zhou Tiancheng 15-21, 21-8, 21-17 in 73 minutes.
In the 73-minute race, Tokiyama showed little emotion in the first set, and only began to celebrate after winning a long rally in the third set, which helped him gain an advantage over Zhou Tiancheng.
"When I won, I was honestly surprised. But now I feel calmer and I'm just happy. I didn't expect to get to this point, but as I kept winning races, I saw opportunities. I don't want to stop there, I want to do well in Bali. I want to dedicate this victory to the fans in Japan because they supported me at the Tokyo Olympics, but I failed to live up to their expectations. Changshan said. The best previous result was winning the Super 500 at the 2018 Toyota Thailand Open.
