If you don't live in Japan, you are advised not to visit Tokyo Olympic 2020.
As I introduced that Japan is not the safe country, but Japan will be more dangerous because of the crowds during the period.
To move to certain point, you will use trains and cars. But train will be more packed with people. Roads will be full of cars, and.won't move smoothly.
It's Tokyo. Why in Tokyo? It'sa pity that most people of outside Japan will hate Japan, again.