What decided the International Olympic Committee to hold the Tokyo 2020 Summer Olympics a year later, in 2021?

Question

In 2020 the International Olympics Committee approved what sport, which had been included in the 2018 Youth Olympics, for inclusion also in the 2024 Summer Olympics in Paris?

Answer 1

The effects of the COVID-19 pandemic declared in 2020
The considerations stated by the IOC for cancellation and for the timing of the postponed Games were: 1. To protect the health of the athletes and everyone involved, and to support the containment of the COVID-19 virus; 2. To safeguard the interests of the athletes and of Olympic sport; 3. The global international sports calendar.