Original news article from May about the project: https://tokyo2020.org/en/news/notice/20190515-02.html
The Tokyo 2020 “G-SATELLITE”, the design of which is based on the 3-kg “CubeSat” satellite known as TRICOM-1R, will be transported to the International Space Station by rocket and launched from there. It will contain a cubicle housing the two animated figures GUNDAM and ZAKU and an electric bulletin board, which will appear once the satellite is in orbit. Seven cameras in the satellite will record and transmit their movements.
Measuring just 10cm x 10cm x 30cm, the G-SATELLITE will orbit the earth for the duration of the Games, broadcasting images of the planet, displaying messages on its electric bulletin board and filming the animated figures.