When are the Olympics and Paralympics?
The 2020 Summer Olympic Games take place between 23 July and 8 August.
The Paralympic Games are due to run between 24 August and 5 September.
The Games were postponed last year because of Covid.
The Olympics will feature 33 sports at 339 events across 42 venues. The Paralympics will feature 22 sports at 539 events across 21 venues.
Most events are in the Greater Tokyo area, although some football games and the marathon will take place in the northern city of Sapporo.
Tokyo 2020 Olympics day-by-day guide
What's new at Tokyo 2020?
What's happening with Covid in Japan?
Japan has had relatively low case numbers, but a new wave of infections began in April.
As of 21 July, there were 848,222 confirmed cases and 15,062 deaths (compared with 5.5 million cases and 128,800 deaths in the UK).
Japan only began vaccinating in February and only 22% of its population of about 126 million is fully vaccinated.
In Tokyo and Osaka, the two cities hit hardest by the recent surge, authorities hope over-65s will be fully vaccinated by the end of July.
Entry to Japan by foreigners from 159 countries - including the UK - is currently banned.