Photo taken on July 22, 2019 shows mascot robot Miraitowa during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Mascot Miraitowa (front L) and Someity (front R) unveil mascot robot Miraitowa during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japanon, July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Mascot Miraitowa (1st L) introduces mascot robot Miraitowa during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan, on July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Photo taken on July 22, 2019 shows the Tokyo 2020 mascot robots during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Mascot Miraitowa poses during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan, on July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Photo taken on July 22, 2019 shows the Tokyo 2020 mascot robots during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

People laugh during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan, on July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Mascot Miraitowa (1st L) makes the same pose with mascot robot Miraitowa during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan, on July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

Mascot robot Miraitowa waves to the children during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan, on July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)

A boy does high-five with mascot robot Miraitowa during the Tokyo 2020 mascot robots unveiling event in Tokyo, Japan, on July 22, 2019. Tokyo 2020 Mascot-type robots will welcome athletes and guests at Games venues and other Games-related locations with human-like movements. (Xinhua/Du Xiaoyi)