On August 22, Tokyo Organising Committee of the Olympic and Paralympic Games (TOCOG) announced the winning bidder for the tender concerning "Course construction work of Sea Forest Cross-Country Course in FY 2017". The contract was won by Seibu Landscape Co., Ltd. The company is part of the Seibu Holdings group, a large aggloremate of companies with the Seibu Railway company at its core. As usual, the organising committee did not make public how many other companies took part in the competition.
| Contract no. | N.A. |
| Contract | Course construction work of Sea Forest Cross-Country Course in FY 2017 |
| Winning bidders | Seibu Landscape Co., Ltd. |
| Price (incl. tax) | 536,4 million JPY |
Course construction work of Sea Forest Cross-Country Course in FY 2017
Sources: TOCOG