[3] [4] Italian company Mondo equipped the stadium with a new track, a Mondotrack WS surface which was given a seal of approval with a World Athletics "Class 1 certificate" in December 2019.

The Mondotrack WS surface in Tokyo's National Stadium is a better and updated version of the track that was provided and installed for the 2016 Summer Olympics in Rio de Janeiro, Brazil.

[5] Due to the risk of a heat wave during the period of the Games, the IOC, Organizing Committee and IAAF decided in October 2019 that the Race Walking and Marathon events would be moved to Sapporo, which hosted the 1972 Winter Olympics.

[6] Apart from the race walks and marathon, nine track and field events will hold finals in the morning session to ensure that they receive maximum visibility for the sport across all time zones.

[7][8] On 16 October 2019, the IOC announced that there were plans to re-locate the marathon and racewalking events to Sapporo due to heat concerns.

This is above the 50 percent rate we aimed for in devising the system, but we believe this is due to the extended qualifying period created after the postponement of the Olympic Games from 2020 to 2021.