If you’re living in Japan, and you buy smartphones like you buy a fashionable spring jacket, then you’ve got a bunch of phones in your cabinet that are just gathering dust.

Tokyo2020 wants your phone! Starting April, Japan telecommunications conglomerate, NTT Docomo, will set up collection boxes in over 2,400 NTT Docomo stores across Japan. Additionally, the Japan Environmental Sanitation Center, will also set up collection centers to collect old PCs, tablets, wearables, monitors, and other electronic devices that can be mined for metals.

The goal is to collect 8 tons of metal, which will yield 2 tons of gold, silver and bronze, and eventually result in the production of 5,000 medals for winners in the Tokyo 2020 Olympic and Paralympic Games.

Said Japanese gymnast Kohei Uchimura of this initiative, “computers and smart phones have become useful tools. However, I think it is wasteful to discard devices every time there is a technological advance and new models appear. Tokyo 2020 Olympic and Paralympic medals will be made out of people’s thoughts and appreciation for avoiding waste. I think there is an important message in this for future generations.”

Sustainability will be a key theme of Tokyo2020. And my hope and expectation is that Tokyo2020 will be a shining model of how to present the Olympics, as it was in 1964. Tokyo2020 will stand in stark contrast to past Olympics.

For example, there are already signs of decay in Rio de Janeiro as venues used for the 2016 Rio Olympics have been abandoned. This is an oft-told tale, with plenty of photographic evidence of waste from past Olympics. Only six months later, the main venue for the Rio Olympics is an empty, pilfered and unused shell of a stadium.

The IOC knows its reputation and perhaps its long-term survival are dependent upon making the Olympics more in line with the host country’s economic plans and means, and more conscious of its obligations to be more socially tolerant and more purposeful in driving sustainability.

Since its inception in 2014, IOC President, Thomas Bach, has driven home the 40 tenets of his vision – The Olympic 2020 Agenda – a list of priorities, principles and actions that will guide the IOC in the coming years. Some of the hopes is to help ensure that host cities do not end up with an overly burdensome budget to hold the Games, to make the bidding process less complicated and less expensive, to ensure non-discrimination on the basis of sexual orientation, and to drive greater sustainability.

The IOC has been working closely with Tokyo2020 to bring its operational budget down from USD30 billion, which is four times the budget put forth in the 2013 bid for 2020. The current goal is to get the budget down to under USD20 billion, which is far under Sochi’s USD50 billion spend, Beijing’s USD40 billion spend, and more in line with London’s USD20 billion spend. I believe that Tokyo Governor Yuriko Koike is making an honest attempt to drive the budget down, as well as create a legacy of sustainability and inclusiveness in Japan.

If you’re in Japan, you too can help! Look for your old smartphones, and the signs at NTT Docomo. Donate a phone, and ensure that a piece of your property becomes a piece of the winning medal for Olympians in 2020.