The Tokyo Olympic clock has hit 500 days-to-go in the Japanese capital's countdown to the Games in 2020.
Organisers marked the milestone on Tuesday, unveiling the stylised pictogram figures for next year's Tokyo Olympics.
The pictogram system was first used extensively in 1964 when Tokyo lasted hosted the Olympics - just 19 years after the end of World War II.
A crude picture system was first used in the 1936 Berlin Olympics, and later in London in 1948. But the '64 Olympics originated the standardised symbols that have become familiar in every Olympics since then.
Japanese athletes posed with the pictograms and their designer Masaaki Hiromura and organisers also toured regions that will host Olympic events, including the area north of Tokyo that was devastated by a 2011 earthquake and tsunami.
Unlike other recent Olympics, construction projects are largely on schedule. The new Olympics stadium, the centrepiece of the games, will be completed by the by the end of the year at a cost estimated at $US1.25 billion ($A1.77 billion).
That's not to say these Olympics are problem free. Costs continue to rise, although local organisers and the IOC say they are cutting costs or at least slowing their rise.
Overall, Tokyo is spending at least $20 billion to host the Olympics. About 75 per cent is public money, although costs are difficult to track with arguments about what are - and what are not - Olympic expenses.
That figure is about three times larger than the bid forecast in 2013.
Tsunekazu Takeda, the president of the Japanese Olympic Committee and a powerful International Olympic Committee member, is also being investigated in a vote-buying scandal that may have helped Tokyo land the Olympics.
Takeda has denied wrongdoing and has not resigned from any of his positions with the IOC or in Japan. He is up for re-election to the Japanese Olympic Committee this summer and could face pressure to step aside.
Australian Associated Press