Back in the sporting arenas, a new generation of Olympic stars are looking to shine after a decade dominated by the likes of Usain Bolt and Michael Phelps.
US swimmer Caeleb Dressel could target seven gold medals, and in track and field, 400 metre hurdlers Karsten Warholm of Norway and the USA's Sydney McLaughlin are among those hoping to emerge as household names.
Gymnastics meanwhile will see Simone Biles attempt to crown her dazzling career by equalling Larisa Latynina's record of nine Olympic gold medals.
New Olympic sports will also be on display in Tokyo, with surfing, skateboarding, sport climbing and karate all making their debut.