Tokyo is marking exactly 2 years before the opening of the 2020 Olympics. Organizers face a host of tasks, including measures to deal with heat and humidity.
The 2020 Tokyo Games are set to officially open on July 24th and end on August 9th. A record 339 events in 33 sports are planned during the 17 days.
A rough schedule of the events was decided this month. The organizing committee will now begin concrete preparations with the governments of Japan and Tokyo.
Officials will study ways to tackle traffic congestion so that athletes and spectators can be transported smoothly. They'll also discuss security, including measures against terrorism.
Beating the heat will be essential for a successful Olympics, along with recruiting and training volunteers.
Organizers hope to enlist more than 110,000 people.
In September, the first test event at an Olympic venue is due to take place in Enoshima. An international sailing competition will be staged at the small island near Tokyo.
As host nation, Japan is also aiming for a record medal haul.
The Japanese Olympic Committee has set a target of finishing 3rd in the gold medal rankings, by winning 30 events. Japan won 12 gold medals in the 2016 Olympics in Rio de Janeiro.
Japanese athletes have done well in judo, women's wrestling, gymnastics and swimming. Hopes for medals are also high in table-tennis and badminton.