Some other cities including Sapporo, Fukushima and Yokohama will be hosting select events like surfing, marathons and walking events. But the majority of the action will take place in Tokyo.
The opening ceremony is on July 23, with the closing ceremony to cap things off two weeks later on August 8.
However, some events — such as football, softball and baseball — kick off on July 21, before the opening ceremony.
What do we call the Tokyo Olympics?
It may be 2021 but officially these games will still be referred to as the 2020 Olympics.
All the branding that was designed with last year in mind will be used, and the medals will still say "Tokyo 2020".
How will Covid-19 affect the Olympics?
These Olympics will obviously be different to any that have gone before.
Overseas spectators have been banned from attending, while local fans have also been barred from stadiums and arenas after the Japanese government put the capital under a Covid-19 state of emergency because of rising new infections and the highly contagious Delta variant.
New coronavirus cases surged to 1,308 in Tokyo on Thursday, a six-month high, as fears rise of a possible dramatic increase that could flood hospitals during the Olympics that start next week.
Athletes are not required to be vaccinated to enter Japan, but the International Olympic Committee (IOC) is encouraging them to get a jab anyway. They will be tested before leaving their home country, on arrival, and regularly throughout the duration of the event.
Athletes will be confined to their accommodation when not training or competing, to minimise the amount of movement and encourage social distancing.
They can't use public transport or visit public places, and won't be able to hang around after their event is over. Instead, they'll need to clear out of the Olympic Village rather than stay and play tourist.
About 11,000 athletes are expected for the Olympics and 4,400 for the Paralympics, which open on Aug. 24. Arrivals will be staggered, and athletes are being asked to arrive as late as possible and leave almost as soon as they finish competing.
How can I follow the action?
Sky Sport will stream and broadcast all of the Tokyo 2020 action through coverage across 12 channels. Live streaming coverage will also be available on Sky Go and Sky Sport Now. TVNZ 1 will have 12 hours of free-to-air coverage throughout each afternoon and evening, with a break for 1 News at 6pm and Seven Sharp.
The Herald will have live updates of the action daily on nzherald.co.nz/sport.
The official Tokyo 2020 website has a full rundown of what events are taking place when. Click here to check it out.
New sports making their Olympic debuts
This year will see the introduction of a number of new sports at the Olympics: skateboarding, surfing and sport climbing.
Skateboarding will feature street and park disciplines — the former featuring a street course with additions including rails and ramps, and the latter seeing competitors bust out big airs in a bowl.
Sport climbing — what you'll recognise essentially as rock climbing — will comprise of lead climbing, bouldering and speed climbing. Competitors will earn points across each discipline, and those who finish with the three highest totals will win medals.
Surfing will be held outside Tokyo at Shidashita beach on the east coast of Japan.
Fresh twists have also been added to existing sports. Basketball will now feature a three-on-three competition, as well as the standard five-on-five, while BMX freestyle has been added to the usual BMX racing, and will see cyclists perform tricks.
Equestrian (jumping): Daniel Meech, Bruce Goodin (individual, team).
Equestrian (eventing): Tim Price, Jesse Campbell (individual, team).
Football: Oly Whites: Joe Bell, Michael Boxall, Liberato Cacace, Joey Champness, Callan Elliot, Matt Garbett, Dane Ingham, Elijah Just, Clayton Lewis, Callum McCowatt, Ben Old, Alex Paulsen, Nando Pijanker, Winston Reid, Jamie Searle, Marko Stamenic, George Stanger, Gianni Stensness, Sam Sutton, Ben Waine, Chris Wood, Michael Woud.
Hockey: Black Sticks: Steve Edwards, Sean Findlay, Leon Hayward, Hugo Inglis, Stephen Jenness, Sam Lane, Dane Lett, Shea McAleese, Jared Panchia, Nick Ross, Kane Russell, Jacob Smith, Blair Tarrant, Dylan Thomas, Nick Wilson, Nic Woods.
Rowing: Jordan Parry (single sculls), Chris Harris and Jack Lopas (double sculls), Stephen Jones and Brook Robertson (pair), Thomas Murray, Hamish Bond, Shaun Kirkham, Michael Brake, Dan Williamson, Phillip Wilson, Tom Mackintosh, Matt MacDonald and Sam Bosworth (eight).
Rugby: All Blacks Sevens: Tim Mikkelson, Scott Curry, Dylan Collier, Tone Ng Shiu, Sam Dickson, Andrew Knewstubb, Ngarohi McGarvey-Black, Sione Molia, Kurt Baker, Joe Webber, Etene Nanai-Seturo, Regan Ware. Sailing: Peter Burling and Blair Tuke (49er), Paul Snow-Hansen and Dan Willcox (470), Micah Wilkinson (Foiling Nacra 17), Sam Meech (Laser), Josh Junior (Finn). Surfing: Billy Stairmand.