Greece competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. Greek athletes have competed in every Summer Olympic Games of the modern era, alongside Australia, France, Great Britain, and Switzerland. As the progenitor nation of the Olympic Games and in keeping with tradition, Greece entered first at the New National Stadium during the parade of nations at the opening ceremony. Like the other closing ceremonies before, the Greek flag also raised during the closing ceremony alongside with Japanese and French flags.
Serbia competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, due to the COVID-19 pandemic. It was the nation's fifth appearance at the Summer Olympics as an independent nation.
Kazakhstan competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. It was the nation's seventh consecutive appearance at the Summer Olympics in the post-Soviet era.
The United States competed at the 2020 Summer Paralympics in Tokyo, Japan from 24 August to 5 September 2021.
Brazil competed at the 2020 Summer Paralympics in Tokyo, Japan from 24 August to 5 September 2021.
Israel competed at the 2020 Summer Paralympics in Tokyo from 24 August to 5 September 2021. The delegation includes 33 athletes – 18 women and 15 men – competing in 11 sports: athletics, badminton, boccia, goalball, paracanoeing, powerlifting, rowing, shooting, swimming, table tennis, and wheelchair tennis.
The Men's individual table tennis – Class 5 tournament at the 2020 Summer Paralympics in Tokyo took place during 25–29 August 21 at Tokyo Metropolitan Gymnasium. Classes 1–5 were for athletes with a physical impairment that affected their legs, and who competed in a sitting position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Women's individual table tennis – Class 10 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 30 August 2021 at Tokyo Metropolitan Gymnasium. Classes 6–10 were for athletes with a physical impairment in their upper body, and who compete in a standing position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Men's individual table tennis – Class 3 tournament at the 2020 Summer Paralympics in Tokyo is taking place between 25 and 29 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 are for athletes with a physical impairment that affected their legs, and who compete in a sitting position. The lower the number, the greater the impact the impairment is on an athlete's ability to compete.
The Women's individual table tennis – Class 3 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 29 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 were for athletes with a physical impairment that affected their legs, and who competed in a sitting position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Men's individual table tennis – Class 2 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 30 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 were for athletes with a physical impairment that affected their legs, and who competed in a sitting position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Men's individual table tennis – Class 4 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 30 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 were for athletes with a physical impairment that affected their legs, and who competed in a sitting position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Men's individual table tennis – Class 1 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 30 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 were for athletes with a physical impairment that affected their legs, and who competed in a sitting position. The lower the number, the greater the impact the impairment aws on an athlete's ability to compete.
The women's individual table tennis – Class 4 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 29 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 were for athletes with a physical impairment that affected their legs, and who competed in a sitting position. The lower the number, the greater the impact the impairment is on an athlete's ability to compete.
The Women's individual table tennis – Class 1-2 tournament at the 2020 Summer Paralympics in Tokyo is taking place between 25 and 29 August 2021 at Tokyo Metropolitan Gymnasium. Classes 1–5 are for athletes with a physical impairment that affected their legs, and who compete in a sitting position. The lower the number, the greater the impact the impairment is on an athlete's ability to compete.
The women's individual table tennis – Class 7 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 30 August 2021 at Tokyo Metropolitan Gymnasium. Classes 6–10 were for athletes with a physical impairment in their upper body, and who compete in a standing position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Women's individual table tennis – Class 6 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 30 August 2021 at Tokyo Metropolitan Gymnasium. Classes 6–10 were for athletes with a physical impairment in their upper body, and who compete in a standing position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Women's individual table tennis – Class 6 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 29 August 2021 at Tokyo Metropolitan Gymnasium. Classes 6–10 were for athletes with a physical impairment in their upper body, and who compete in a standing position. The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
The Women's individual table tennis – Class 11 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 28 August 2021 at Tokyo Metropolitan Gymnasium.
The Women's individual table tennis – Class 5 tournament at the 2020 Summer Paralympics in Tokyo took place between 25 and 29 August 2021 at Tokyo Metropolitan Gymnasium.
