April 14 marks the 100-day countdown to the Tokyo 2020 Olympic Games. /CGTN

The Japan National Olympic Stadium, which will host the opening and closing ceremonies, athletics, football, Paralympics athletics at Tokyo 2020, in Tokyo, Japan, December 29, 2019. /CFP

The Yoyogi National Stadium, which will host the handball, badminton, wheelchair rugby events at Tokyo 2020, in Tokyo, Japan, April 3, 2021. /CFP

The Nippon Budokan, venue for the Judo, Karate, Paralympics Judo events at Tokyo 2020, in Tokyo, Japan, January 5, 2019. /CFP

The historic Sumo wrestling venue Kokugikan Arena is set to host boxing events at Tokyo 2020, in Tokyo, Japan, February 27, 2020. /CFP

The Tokyo Aquatics Center, venue for the artistic swimming, diving, swimming, Paralympics swimming at Tokyo 2020, in Tokyo, Japan, April 6, 2021. /CFP

A player paddles during a canoe sprint test event at Sea Forest Waterway, venue for the canoeing and rowing events at Tokyo 2020, in Tokyo, Japan, September 13, 2019. /CFP

The Ariake Arena, venue for the volleyball and Paralympic basketball events at Tokyo 2020, is lit up in Olympic colors in Tokyo, Japan, July 23, 2020. /CFP

The Odori Park, venue for the the marathon and race walking events at Tokyo 2020, is illuminated during the Sapporo Snow Festival in Sapporo, Japan, February 3, 2020. /CFP

Canoers paddle during a test event at the Kasai Canoe Slalom Center, which is the first artificial canoe slalom course in the country, in Tokyo, Japan, July 6, 2019. /CFP

The Fukushima Azuma Baseball Stadium, venue for the baseball and softball events at Tokyo 2020, has been reconstructed after the city hit by the earthquake, tsunami and nuclear meltdown in 2011. /AFP