USASACUPI

The **United States Army Security Agency, Chitose Unit, Pacific Intelligence** (USASACUPI) was a signals intelligence (SIGINT) unit of the U.S. Army Security Agency (ASA) located in Chitose, Hokkaido, Japan. Activated during the early years of the Cold War, USASACUPI played a crucial role in monitoring Soviet and regional communications in Northeast Asia. The unit provided critical intelligence support to U.S. forces and allied partners, contributing to strategic decision-making throughout the region. USASACUPI remained operational until the late 1970s, when advances in technology and changes in strategic priorities led to the consolidation of intelligence operations in Japan.