On June 26, Tokyo Organising Committee of the Olympic and Paralympic Games (TOCOG) announced the winning bidders for the tender concerning "Preliminary design of Temporary Overlays V Olympic Aquatics Centre and 4 other venues." The contract was won by Tokyo-based NISSOKEN Architects/Engineers. The company will be responsible for the basic design of temporary overlays at Olympic Aquatics Center in Koto ward, the Tokyo Tatsumi International Swimming Center, the venue for the archery competition at Yumenoshima Park, the Musashino Forest Sports Plaza and Tokyo Stadium in Chofu ward.
| Contract no. | 29-1010 |
| Contract | "Preliminary design of Temporary Overlays V Olympic Aquatics Centre and 4 other venues. |
| Winning bidders | NISSOKEN Architects/Engineers |
| Price (incl. tax) | 159.8 million JPY |
Sources: TOCOG, Business Navi 2020