The Japanese public will be asked to donate old phones and small appliances to gather two tonnes of gold, silver and bronze for the 5,000 medals.
Organisers hope to gather eight tonnes of metal to create the two tonnes of gold, silver and bronze required for medals 
The project hopes to promote sustainability and reduce costs.
“A project that allows the people of Japan to take part in creating the medals is really good,” said Tokyo 2020 sports director Koji Murofushi.
