Jointly, they comprised the First U.S. Army Communications Center with general headquarters in the Dai-ichi Life Building, Tokyo.

[7] In 1964, the Signal Command transferred the long haul communications mission, including tape rely, transmitter, receiver, microwave, and troop sites to the United States Air Force.

From 1965 to 1966, the battalion remained a facility operated by the U.S. Army Strategic Communications Command (STRATCOM) and underwent two name changes.

In November 1966, they were again re-designated was redesigned to U.S. Army Strategic Communication Signal Group (USASTRATCOM), Japan.

Meanwhile, the Headquarters Army staff also reorganized to fully integrate the information functions of automation, administration, communication, and command and control under the assistant chief of staff for information management, which provided direction and leadership at the Department of Army level.

This reorganization was necessary to achieve better oversight, disciplined acquisition, and improved the quality, flow, and processing of information.

In 1985, the INSCOM Detachment was inactivated and AMSF became a separate, subordinate element of USAISC-Japan, at Camp Zama.

In April 1985, the USARJ information mission consisting of audiovisual and automation functions was transferred to USAISC-J.

On mainland Japan, the reorganization of SAN under the Information Mission Area (IMA) concept continued through the 1980s.

The 1104th was inactivated September 30, 1991, and command of the battalions transferred to the 1106th U.S. Army Signal Brigade in Hawaii.

[9] Following the devastating magnitude 9.1 Tōhoku earthquake in northeastern Honshu, Japan March 11, 2011, 78th Signal Battalion unit personnel contributed significantly to the disaster relief efforts during Operation Tomodachi.