Urayasu D-Rocks, commonly known as the D-Rocks, or the Shining Arcs, is a rugby union team owned by NTT Communications and is part of Japan's Rugby League One competition, currently in Division 2. Given the name, the team is based in Urayasu City, Chiba Prefecture in the Kantō region. The team has undergone sevenral re-brands throughout is history, most recently in 2022, rebranding from Shining Arcs Tokyo-Bay Urayasu in line with the newsly formed Japan Rugby League One competition in 2021/22, to the Urayasu D-Rocks in 2022 onwards. From Wikipedia
