The following is a chronology of major events related to the Tokyo Olympics, due to open July 23.
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Sept. 7, 2013 -- Tokyo wins bid to host 2020 Summer Games.
Jan. 24, 2014 -- Tokyo Olympic organizing committee set up.
(From L) Then Japanese Prime Minister Shinzo Abe, former International Olympic Committee President Jacques Rogge, disgraced Tokyo bid chief Tsunekazu Takeda and former Tokyo Gov. Naoki Inose are seen at a signing ceremony in Buenos Aires on Sept. 7, 2013, after Tokyo was chosen as the host city of the 2020 Summer Olympics at the International Olympic Committee's general session. (Kyodo)
Oct. 16, 2019 -- International Olympic Committee announces plan to relocate marathon and race walking events to Sapporo due to heat concerns.
Jan. 30, 2020 -- World Health Organization declares coronavirus outbreak global health emergency.
Feb. 4 -- Tokyo Olympic organizing body sets up task force to deal with coronavirus outbreak.
March 11 -- WHO calls coronavirus outbreak "pandemic."
March 12 -- Olympic flame-lighting ceremony held at site of ancient Olympics in Greece without spectators.
The Tokyo Olympic flame lighting ceremony is held in ancient Olympia, Greece, on March 12, 2020. (Kyodo) ==Kyodo
March 20 -- Olympic flame arrives in Japan.
March 24 -- Then Japanese Prime Minister Shinzo Abe, IOC chief Thomas Bach agree to delay Tokyo Olympics and Paralympics by one year.
March 30 -- IOC, Japanese organizers agree to hold Olympics from July 23 to Aug. 8, 2021.
March 20, 2021 -- Organizers decide to stage Tokyo Olympics and Paralympics without overseas spectators due to pandemic.
March 22 -- Tokyo Olympic organizing committee says most volunteers from overseas will not be allowed to enter Japan.
March 25 -- Tokyo Olympic torch relay begins in Fukushima Prefecture.
Members of the 2011 Women's World Cup-winning Japan soccer team run at the start of the Tokyo Olympic torch relay at the J-Village soccer training center in Fukushima Prefecture on March 25, 2021. (Kyodo) ==Kyodo
May 28 -- Prime Minister Yoshihide Suga says he will consider allowing spectators at venues.
June 16 -- Japanese government decides to allow up to 10,000 spectators at large events.
June 17 -- Japanese government decides to end state of emergency in Tokyo.
June 18 -- Japan's top COVID-19 adviser says staging Tokyo Olympics without spectators "desirable."
June 21 -- Organizers set Tokyo Olympic spectator cap at 10,000 per venue.
July 8 -- Organizers agree to hold Olympics without spectators in and around Tokyo following Japanese government's decision to declare state of emergency.
July 23 -- Tokyo Olympics opens.