Located under the town of Namimori in Japan, this secret base was commissioned by the future Tsunayoshi Sawada. It is connected to the Foundation headquarters via a steel door, but this is rarely used due to the future Kyoya Hibari's wishes. There are six entrances to the Base, all camouflaged and protected by a security system. One of the entrances is hidden in a forest, while another is concealed at an abandoned warehouse district. The location of the remaining entrances, and whether said six entrances includes the connection with the Foundation headquarters, is unknown.