A staff introduces Power Assist Suit, which may be used in Tokyo 2020 Olympic and Paralympic Games, in Tokyo, Japan, on March 15, 2019. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

A staff demonstrates Power Assist Suit, which may be used in Tokyo 2020 Olympic and Paralympic Games, in Tokyo, Japan, on March 15, 2019. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

A staff demonstrates Power Assist Suit, which may be used in Tokyo 2020 Olympic and Paralympic Games, in Tokyo, Japan, on March 15, 2019. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

Hirohisa Hirukawa, Project Leader of the Tokyo 2020 Robot Project speaks during the launch event of Tokyo 2020 Robot Project in Tokyo, Japan, on March 15, 2019. (Xinhua/Du Xiaoyi)

Photo taken in Tokyo, Japan, on March 15, 2019 shows Delivery Support Robot (L) , Human Support Robot (C) and Power Assist Suit, which may be used in Tokyo 2020 Olympic and Paralympic Games, in Tokyo, Japan, on March 15, 2019. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

Photo taken in Tokyo, Japan, on March 15, 2019 shows the Human Support Robot, which may be used in Tokyo 2020 Olympic and Paralympic Games. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

Human Support Robot takes goods to a staff in wheelchair from the Delivery Support Robot in Tokyo, Japan, on March 15, 2019. Both robots may be used in Tokyo 2020 Olympic and Paralympic Games. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

Photo taken in Tokyo, Japan, on March 15, 2019 shows the Human Support Robot (front) which may be used in Tokyo 2020 Olympic and Paralympic Games. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)

The Human Support Robot, which may be used in Tokyo 2020 Olympic and Paralympic Games, delivers goods to a staff in wheelchair in Tokyo, Japan, on March 15, 2019. The Tokyo 2020 Organizing committee announced the launch of its new Tokyo 2020 Robot Project on Friday. (Xinhua/Du Xiaoyi)