In July 2021, we began building a new city stadium (proposed name: OTA ARENA) that meets B1 LEAGUE criteria in Ota, Gunma, the hometown of the Gunma Crane Thunders, a professional basketball team that is part of the OPEN HOUSE Group, so that they can achieve their goal of becoming No. 1 in Japan in the next few years. Using Japan’s regional revitalization support tax system (corporate hometown tax payments), we plan to build a high-spec arena while limiting the burden on the local government and private sector. The Gunma Crane Thunders, the city of Ota, and OPEN HOUSE are joining forces to work to resolve regional issues. Additionally, we aim to build a dream arena that attracts attention from all over Japan and to create a leading example of sports being utilized for regional co-creation.