A general view shows the illuminated Tokyo Skytree tower to mark a year-to-go until the start of the postponed Tokyo 2020 Olympics in Tokyo, Japan, July 23, 2020. (Xinhua/Du Xiaoyi)

Tokyo Skytree tower is illuminated to mark a year-to-go until the start of the postponed Tokyo 2020 Olympics in Tokyo, Japan, July 23, 2020. (Xinhua/Du Xiaoyi)

Tokyo Metropolitan Government Office building is illuminated with the Olympic symbol colours to mark a year-to-go until the start of the postponed Tokyo 2020 Olympics in Tokyo, Japan, July 23, 2020. (Xinhua/Du Xiaoyi)

A general view shows the illuminated Tokyo Skytree tower to mark a year-to-go until the start of the postponed Tokyo 2020 Olympics in Tokyo, Japan, July 23, 2020. (Xinhua/Du Xiaoyi)

The Ariake Arena is illuminated with the Olympic symbol colours to mark a year-to-go until the start of the postponed Tokyo 2020 Olympics in Tokyo, Japan, July 23, 2020. (Xinhua/Du Xiaoyi)