The men's cycling road race will be held on day one of competition, on a route that winds its way from Tokyo to the base of Mount Fuji, while surfing, which is making its Olympic debut, will start on the first weekend in a bid to increase scheduling flexibility in the event of weather issues.
The pointy-eared mascots bestowed with "special powers" were unveiled in February this year after being chosen by schoolchildren from a shortlist of three across mascot-mad Japan.
"Miraitowa" combines the Japanese words for future and eternity, while "Someity" takes its name from the "someiyoshino" cherry blossom variety, which Tokyo 2020 say resonates with "so mighty" in English. And the name is also something we have picked together.
"I think a very worthy name has been picked not only for Tokyo, but for Japan as well as the Olympics and Paralympics", said Tokyo governor Yuriko Koike.
Hundreds of people attended the launch event, where the mascots "teleported" from Hibiya to Asakusa, the centre of old Tokyo.
After leaving the Hibiya events, the mascots showed up on a boat in Asakusa, and cruised down the Sumida River, greeting fans lining the river along the way.
As informs a press-service of the International Olympic Committee, in the next "white" Olympics already included 6 new disciplines. Miraitowa has a strong sense of justice and is very athletic.
"You are part of the Olympics as well", Mori told the assembled children. "So this Olympics belongs to everyone".
Known locally as "yuru-kyara" or "laid-back characters", mascots can also be major money-spinners.
However, most aquatic events" specific dates are still "to be determined.' Accompanying the high-level schedule is a note indicating, 'Tokyo 2020 is now completing the competition schedule by session for swimming, artistic swimming, and diving, and will finalise this shortly'.